Workout Routine in 2018

In 2018, I will do weight training for the first time in my life. I’m reading Michael Matthews’ Bigger Leaner Stronger and will follow his advice on diet and weight training.

In short, it will be:

  • High protein, slow carb, and low fat diet rather than no carb diet
  • CompoundΒ exercises rather than isolation exercises
  • HIIT (high intensity interval training) rather than regular cardio

Since I won’t have time to hit the gym mostly, I will start with bodyweight exercises as follows:


I will report how it goes later.

Happy & healthy new year, everyone!Β πŸ’ͺ


ν•œκ΅­μ—μ„œ μ§„μž‘ 40이 된 μΉœκ΅¬λ“€μ—κ²ŒλŠ” λ―Έμ•ˆν•˜μ§€λ§Œ, λ‚œ μ—Šκ·Έμ œ 39이 λ˜μ—ˆλ‹€. 😎

38 κ΄‘λ•‘μ˜ ν•΄μ˜€λ˜ μ§€λ‚œ ν•œ ν•΄λŠ” 이직과 (잠깐 창업도) 이사, 큰 μ•  μœ μΉ˜μ› μž…ν•™, μ•„λ‚΄μ˜ 은퇴 λ“± λ§Žμ€ μΌλ“€λ‘œ λ°”λΉ΄λ‹€. 덕뢄에 μ˜¬ν•΄λŠ” 적어도 이직, 퇴사, 이사, μž…ν•™κ³Ό 같은 큰 일은 없을 것 κ°™λ‹€.

뢈혹의 40 μ „ λ§ˆμ§€λ§‰ ν•œ ν•΄λŠ” λ‚΄ μžμ‹ κ³Ό κ°€μ •, 직μž₯, κ΅νšŒμ—μ„œ 내싀을 κΈ°ν•˜λŠ” ν•΄λ‘œ μ‚Όκ² λ‹€. μƒˆλ‘œμš΄ 것을 μ‹œμž‘ν•˜κΈ°λ³΄λ‹€ μ§€λ‚œ ν•΄κΉŒμ§€ μ‹œμž‘ν•œ λ§Žμ€ 일듀을 κΎΈμ€€νžˆ κ³„λ°œν•˜μ—¬ ν•˜λ‚˜ λ‘˜ μ”© 마무리 짓고 결싀을 κ±°λ‘μ—ˆμœΌλ©΄ ν•œλ‹€.

μΌλ‘€λ‘œ λ‚΄λ…„μ—λŠ” λͺΈμ§±μ΄ λ˜κ² λ‹€. 고등학ꡐ λ•ŒκΉŒμ§€ νŒ”κ΅½ν˜€νŽ΄κΈ° ν•˜λ‚˜, μ§€λ‚œ ν•΄κΉŒμ§€ 턱걸이 ν•˜λ‚˜ λͺ»ν–ˆλŠ”데, μ§€κΈˆμ€ ν•˜λ£¨μ— νŒ”κ΅½ν˜€νŽ΄κΈ° 100개, 턱걸이 20κ°œμ”© ν•˜κ³  μžˆλ‹€. μ˜¬ν•΄μ—λŠ” 더 μ²΄κ³„μ μœΌλ‘œ λ‹€λ₯Έ μš΄λ™λ“€κ³Ό λ°”λ₯Έ μ‹μƒν™œκ³Ό λ³‘ν–‰ν•΄μ„œ 40의 λ‚˜μ—κ²Œ κ±΄κ°•ν•œ λͺΈμ„ 선사해야겠닀.

사싀 이런 κ³„νšμ΄ λ¬΄μƒ‰ν•˜κ²Œλ„ μ§€λ‚œ μ—΄ν˜ κ°„ μ•„νŒŒ λˆ„μ›Œμžˆμ—ˆλ‹€. 이주 μ „ μ‹œμ• ν‹€ 좜μž₯ ν›„, λ‚΄ 감기둜 μ‹œμž‘ν•΄ 온 가쑱이 μ•„ν”„κ³  λ‚«κ³ ν–ˆλŠ”λ°, μ •μž‘ λ‚˜λŠ” 아직 골골데고 μžˆλŠ” 쀑이닀. 어렸을 λ•ŒλŠ” λ‚˜ 혼자 μ•„ν”„κ³  λ§μ•˜μ§€λ§Œ, μ΄μ œλŠ” λ‚΄κ°€ μ•„ν”„λ©΄ 온 가쑱이 영ν–₯을 λ°›λŠ”λ‹€. 아프지 말자. πŸ’ͺ

39. μ°Έ λ§ˆμŒμ— λ“œλŠ” μˆ«μžμ΄λ‹€. λ‚΄λ…„ 이맘 λ•Œ μ˜¬ν•΄λ₯Ό λŒμ•„λ³΄λ©° “μ—­μ‹œ λ§ˆμŒμ— λ“œλŠ” ν•œ ν•΄μ˜€λ‹€” ν•  수 있기λ₯Ό λ°”λž€λ‹€.

Q3 2017 Review

Q3 2017 passed by quickly with a couple of major events at work and family… Wait. Did I say that at the Q2 review? DΓ©jΓ  vu.

First, I left Conversion Logic, which I was part of the founding team since 2014, and joined Microsoft. While my team is in Redmond, WA, I work from home mostly. I will write about it with more details sometime later.

Second, my family moved from Torrance to Rancho Palos Verdes (RPV). My wife grew up and has lived in Torrance for 20 years. I moved to Torrance in 2007 when I started dating with her. We love Torrance, but thought that RPV would be better for our children.

Moving was challenging. It took 3 moving trucks and 2 full days. Even after two months, we still have lots of boxes to unpack and many things to fix. We hope that this is our last move.

Third, Joseph started kindergarten. The transition from preschool to kindergarten was a big deal for both Joseph and us. He needs to get to school by 8:30 am and be done between 3 and 4 pm. After coming home, he needs to finish his homework before any play time.

That means that we need to adjust our schedules to accommodate his (plus schedules of his three brothers). For us, it helps that I work from home with a flexible schedule, but I have no idea how other working parents manage to do so.

Fourth, our nanny found a full time job. Big congrats to her and we’re so happy for her. The downside is that we have even less time on our own.

So, setting aside all the excuses, let’s check the progress towards goals:

Yearly Goals

  • Running 200 miles (53%) – I ran only 5 miles in Q3, and 105 miles in 2017 so far. Those 5 miles were done during my business trip. I couldn’t carve out even 30 minutes to hit the gym.
  • Reading 24 books (79%) – I read 4 books in Q3, and 19 books so far.
    • Contact – Classic science fiction by Carl Sagan. Phenomenal. Different from the movie.
    • Algorithms to Live By – How to apply CS algorithms in real life. Very insightful and entertaining for those with CS background.
    • Judges for You – by Tim Keller. Brutal reality of humanity without God. “Everyone did what was right in their own eyes”.
    • The Language of God – by Francis Collins, Director of NIH and former head of the Human Genome Project. Scientist’s perspective on God and faith. “Mere Christianity” in 21st century.
  • Winning 1 competition (x) – In Q3, I formed a team with 4 first time Kagglers at Microsoft and worked on Carvana Image Masking Challenge for a week as a hack project. We finished 130th out of 735 teams.
  • Writing a book on Kaggle (x) – no progress
  • Reading the BibleΒ βœ…

Weekly Goals

  • Reading 1 paper – no progress
  • Writing 1 blog post – 17% completion in Q3 with 2 articles
  • Writing 5 pages of the Kaggle book – no progress

Daily Goals

  • 20 pull-ups – 51% success with the average of 14.5 / day
  • 100 push-ups – 32% success with the average of 47.6 / day
  • 2 prayers – 1% success
  • QT – 33% success
  • Writing 1 article of any kinds – no progress

Q3 2017 was very challenging. For about a month around the move, I was in the survival mode, barely doing my duties at work and home.

Although, Q4 started with most of the same challenges outstanding, I’m positive that I can achieve more in Q4 – because I’ve become more effective than ever by going through the toughest quarter.

Let’s finish 2017 strong!

Transition from Exploration to Exploitation

I realize that I spend the majority of time on consuming what others produce. Reading, watching, and listening to materials created by others.

It makes sense to do so when I was young and in the exploration stage of my life. I needed a lot of advice and information from others when I was uncertain about what to do for my career, who to live for the rest of my life together, where to settle and live, and so on.

Exploitation vs. Exploration (credit:

However, now I entered into the exploitation stage – I’ve developed my expertise in my career, data science. I married love of my life and had our children together. My family moved to a place where we’d like to live for generation.Β I need to start to focus on producing.

It’s not to say that I’ve already figured out everything and I don’t need to learn anymore. It’s opposite. It’s time to learn new things about how to produce best by utilizing what I’ve learned in the past.

Studies on the secretary problem state that the optimal stopping point of exploration is 37%. e.g. If you’re recruiting a secretary next 100 days, it’s optimal to pass all candidates during the first 37 days to learn about the total distribution of candidates, and then to hire the first person who is better than all candidates who you interview in the first 37 days.

I spent little over 37% of my life so far, by assuming 100 years of life expectancy by 2080. From now on, I will focus on exploitation, execution, and production.

Q2 2017 Review

Image from

Q2 2017 passed by quickly with a couple of major events at work and family, which I will share when things get settled down.

In spite of a challenging schedule,Β a new goal tracking app, Strides, helped me track the progress of goals easily and keep on track of completing those. Even I added a few new goals for the rest of the year.

Yearly Goals

  • Running 200 miles (50%) – I ran 42 miles in Q2, and 100 miles so far.
  • Reading 24 books (63%) – I read 6 books in Q2, and 15 books so far.
    • Ghost in the WiresΒ – About the legendary hacker, Kevin Mitnick. Very entertaining.Β πŸ‘
    • How Google Works – Insider stories of Google by Eric Schmidt and Jonathan Rosenberg. No surprises.
    • Born a Crime – Hilarious yet inspiring and heartwarming personal stories by Trevor Noah. Strongly recommended.Β πŸ‘
    • The Black Swan – It emphasizes the impact of rare events, which are often ignored by traditional forecasting
    • Origins –Β Fourteen billion years of history of the Universe.Β πŸ‘
    • How to Publish Your Book – Practical guides to publish a book.Β πŸ‘
  • Winning 1 competition – In Q2, I managed to participate in only one, the Quora Question Pair competition. My team finished 36th out of 3,307 teams.
  • Reading the BibleΒ βœ…
  • Writing a book on Kaggle (new)

Weekly Goals (new)

  • Reading 1 paper (new)
  • Writing 1 blog post (new)
  • Writing 5 pages of the Kaggle book (new)

Daily Goals

  • 20 pull-ups – 65% success with the average of 18.4 / day
  • 100 push-ups – 52% success with the average of 72.6 / day
  • 2 prayers – 5% success
  • QT – 45% success
  • Writing 1 article of any kinds (new)

Quora: What should I do to get into Google’s DeepMind team?

Read Jeong-Yoon Lee's answer to What should I do to get into Google's DeepMind team? on Quora

Goal Tracking App – Strides

Yesterday, I subscribed to a goal tracking app, Strides at $39.99 per year. Among hundreds of apps that I use, this is the third most expensive app after Yousician ($119 per year) and Dropbox ($99 per year). So, by my standard, it must be very useful.

Strides helps you set and track goals by either the occurrences (e.g. for smoking, smoked or not), target numbers (e.g. for reading, 1 book per month or total of 12 books in 2017), or milestones (e.g. for a website, research, design, development, and launch) over various time intervals.

The first screen is the dashboard that lists all the goals currently being tracked.Β Once a goal is selected, it shows the trend and progress of the goal based on the tracking method.

I like how simple and straightforward it is. Once downloaded, I was able to use it right away after spending just a couple of minutes.

Strides is available for free up to 10 goals with few limitations on tagging and filtering. Therefore, you can try it out before purchase.

If you can’t measure it, you can’t improve it.

Hope it helps you make improvements on your goals. Good luck! 😎

Quora: What are the Most Important Books for Startup Founders to Read?

Read Jeong-Yoon Lee's answer to What are the most important books for startup founders to read? on Quora

New Address –

I moved my blog from to

I’ve used since 1999. Ethiel (μ΄λ””μ—˜) was the name of a Christian student club at my high school.

After 18 years of sporadic blogging, I decided to make my blog more personal by using my name as its address.

I also write on I will continue to write on both.

I plan to post at least one article per week.

If you want to receive updates for either, please subscribe to the blog.

Let’s start the new era. 😎

2017λ…„ 1사뢄기 λŒμ•„λ³΄κΈ°

μ •λŸ‰μ  λͺ©ν‘œ

  • 200마일 λ›°κΈ°(29%) – ν˜„μž¬ 58마일 λœ€. κΌ­ 가지 λͺ»ν•  μ΄μœ κ°€ μ—†μœΌλ©΄ ν—¬μŠ€μž₯μ—κ°€μ„œ 2마일/20λΆ„μ”© λ›°μ—ˆλ‹€.
  • μ±… 24ꢌ 읽기 (38%) – ν˜„μž¬ 9ꢌ 읽음. μž‘λ…„λΆ€ν„° 읽던 μ±… 쀑 μ˜¬ν•΄ 마무리 지은 책이 4ꢌ μžˆλ‹€. μ˜¬ν•΄ λͺ©ν‘œλŠ” λ¬΄λ‚œνžˆ 달성할 λ“―.
  • μ„±κ²½ 1독 βœ… – 1독이라기보닀 1μ²­μ΄μ—ˆλ‹€.
  • 맀일 15λΆ„ 기도 – 세상에. ν•˜λ£¨μ— 15λΆ„ κΈ°λ„ν•˜λŠ” 것도 λͺ»ν•˜λ‹€λ‹ˆ. Q2μ—λŠ” μ΅œμš°μ„  μˆœμœ„λ‘œ 놓고 μ§€μΌœμ•Όκ² λ‹€.
  • λ°μ΄ν„°μ‚¬μ΄μ–ΈμŠ€ λŒ€νšŒ μž…μƒ 1회 (0%) – λŒ€νšŒ μ°Έμ—¬ν•˜λŠ” 것보닀 λŒ€νšŒμ— λŒ€ν•΄ λ°œν‘œν•˜λŠ”λ° μ‹œκ°„μ„ 많이 썼닀. Q2μ—λŠ” λ‹€μ‹œ λŒ€νšŒμ— κΎΈμ€€νžˆ 참여해야지.
  • 빚 XXX 갚기 (x%) – μ—΄μ‹¬νžˆ 갚자. μœΌμ‹ΈμœΌμ‹Έ.

Q2에 μƒˆλ‘œ μΆ”κ°€ν•œ μ •λŸ‰μ  λͺ©ν‘œ

  • 턱걸이 10개 (20%) – ν˜„μž¬ μΉ˜νŒ…ν•˜λ©΄ 5개, μ œλŒ€λ‘œ ν•˜λ©΄ 2개.
  • νŒ”κ΅½ν˜€νŽ΄κΈ° 50κ°œΒ βœ…

정성적 λͺ©ν‘œ

  • μ•„λ‚΄ μ„œμš΄ν•˜κ²Œ ν•˜μ§€ μ•ŠκΈ° – μ°Έ λΆ€λ„λŸ½λ‹€. λ§ˆμŒμ€ μ•ˆ 그런데 μ°Έ 아내와 μ•„μ΄λ“€μ—κ²Œ 잘 λͺ»ν•œλ‹€. 더 λ…Έλ ₯ν•΄μ•Όκ² λ‹€.
  • ν•˜λ‚˜λ‹˜κ³Ό κ°€κΉŒμ›Œμ§€κΈ° – 이것도 μ°Έ λΆ€λ„λŸ½λ‹€. μœ„μ— 기도뢀터 μ‹œμž‘ν•˜μž.
  • 건강해지기 – μ—°μ΄ˆ κ±΄κ°•κ²€μ§„μ—μ„œ 전년보닀 μ½œλž˜μŠ€ν…Œλ‘€ μˆ˜μΉ˜κ°€ 많이 μ’‹μ•„μ‘Œλ‹€. μΌν•˜κ³  μœ‘μ•„μ—μ„œ 슀트레슀 받지 μ•Šλ„λ‘ κ΄€λ¦¬ν•΄μ•Όν•˜λŠ”λ°, μš”μ¦˜ 일이 많이 λ°”μ˜κ³  좜μž₯도 μž¦μ•„μ„œ 쉽지 μ•Šλ‹€. μ§€λ‚œ μ£Ό μ‹œμ• ν‹€ 좜μž₯κ°”λ‹€ λŒμ•„μ˜€λŠ” λΉ„ν–‰κΈ° μ•ˆμ—μ„œ 잠깐 κΈ°μ ˆν•΄μ„œ 깜짝 λ†€λžλ‹€. μš΄λ™/식사/νœ΄μ‹μ— λͺ¨λ‘ 신경써야겠닀.
  • κ°€μ •κ΅νšŒ 잘 μΈλ„ν•˜κΈ° – μ—°μ΄ˆμ— μ˜μš•μ μœΌλ‘œ μ‹œμž‘ν–ˆλŠ”λ°,Β 3μ›”μ—λŠ” λ‚΄λ‚΄ 가쑱듀이 μ•„νŒŒμ„œ μ œλŒ€λ‘œ λͺ»ν–ˆλ‹€. λ‹€μ‹œ μ‹œμž‘ν•˜μž.
  • 기타/μ•…κΈ° 배우기 – μ—­μ‹œ μ—°μ΄ˆμ— μ˜μš•μ μœΌλ‘œ Yousician에 κ°€μž…ν•΄μ„œ μš°μΏ¨λ λ ˆλΆ€ν„° μ‹œμž‘ν–ˆλ‹€κ°€ 쀑간에 그만 λ’€λ‹€. λ‹€μ‹œ μ‹œμž‘ν•˜μž.

Q2에 μƒˆλ‘œ μΆ”κ°€ν•œ 정성적 λͺ©ν‘œ

  • μ•„μ΄λ“€μ—κ²Œ 화내지 μ•ŠκΈ° – 쉽지 μ•Šμ§€λ§Œ, λ…Έλ ₯ν•˜μž.

μ—­μ‹œ μ •λŸ‰μ  λͺ©ν‘œλ₯Ό μ„Έμš΄ ν•­λͺ©λ“€μ€ 비ꡐ적 잘 ν•˜κ³  μžˆλŠ” 반면, 정성적 λͺ©ν‘œμ— ν•΄λ‹Ήν•˜λŠ” ν•­λͺ©λ“€μ€ λ†“μΉ˜λŠ”κ²Œ λ§Žλ‹€. 정성적 λͺ©ν‘œλ“€λ„ μΈ‘μ •ν•  수 μžˆλŠ” 방법을 생각해 봐야겠닀.

μ–Έμ œλ‚˜μ²˜λŸΌ μ‹œκ°„μ€ λΉ λ₯΄κ²Œ κ°„λ‹€. 정신차리지 μ•ŠμœΌλ©΄ μ€‘μš”ν•œ 것듀을 λ†“μΉ˜λ©° 마λƒ₯ λ°”μ˜κ²Œ ν•˜λ£¨ ν•˜λ£¨ 보내기 쉽닀. 쓸렀가지말고 흐름을 타고 λ‚΄κ°€ μ›ν•˜λŠ” λ°©ν–₯으둜 갈 수 μžˆλ„λ‘ μ§‘μ€‘ν•˜μž.