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Hun Kim

Your Brain’s Hidden Rules for Shaping Behavior

Your Brain’s Hidden Rules for Shaping Behavior

"To truly understand habits is to understand how the brain designs our behavior. Insight alone won’t magically change habits, but once you grasp why it’s so hard, you’ll know how to spend your time to earn better ones." — Professor Jaeseung Jeong, from his recommendation of

Color-Coding Your Calendar to Improve Time Management

Color-Coding Your Calendar to Improve Time Management

Cognitive load is the amount of mental energy your brain spends processing information. Psychologists note that our working memory can handle only 4–5 items at once. Yet modern knowledge workers juggle dozens of tasks every day. The problem is that once cognitive load passes a certain threshold, your brain’

How to Turn Ideas into Actionable To-Dos

How to Turn Ideas into Actionable To-Dos

We back up thousands of photos and hundreds of files, yet we rarely archive our most valuable assets: ideas. Those flashes in the shower, the commute brainstorms, the clever fixes from a quick chat—most vanish within days or sink into forgotten notes. That’s a problem, because some of

A Digital Guide to Integrating GTD + Bullet Journal + PARA

A Digital Guide to Integrating GTD + Bullet Journal + PARA

Why Three Methods Need One System Picture this: a GTD book on your desk, a PARA folder structure neatly arranged on your laptop, and a bullet journal open beside you. Each is a great productivity method on its own—but have you ever wondered whether the three can actually work

Calendar Note-Taking Inspired by Sam Altman

Calendar Note-Taking Inspired by Sam Altman

How many times did you open your calendar today? Right after waking up, on the subway, before a meeting, over lunch, to check when you can head home—most of us glance at it dozens of times. If it’s the screen we see most, could it be more than

효과적인 휴가와 복귀: 업무 리듬 유지하기

효과적인 휴가와 복귀: 업무 리듬 유지하기

2025년은 대한민국 직장인들에게 황금연휴의 해라 불릴 만합니다. 5월 노동절을 시작으로 이어지는 황금연휴, 6월에 하루 늘어난 휴일, 그리고 10월 개천절부터 시작되는 추석 황금연휴까지, 올해는 유독 긴 연휴가 많은 해입니다. 이런 장기 휴가는 재충전의 절호의 기회이지만, 동시에 업무 리듬이 완전히 깨질 수 있는 위험을 가지고 있습니다. 휴가에서 돌아온 후 "휴가 후유증&

Switch Log by Superhuman’s Founder

Switch Log by Superhuman’s Founder

Why did context switching get such a bad name? Most productivity advice treats context switching as the enemy. You often hear “focus on one thing at a time” and “protect deep work by minimizing switching.” Studies are frequently cited showing that it can take around 23 minutes to regain full

Brain Dump: Clearing a Cluttered Mind

Brain Dump: Clearing a Cluttered Mind

Have you ever gone to bed after a long day, only to lie awake because your mind will not quiet down? Tomorrow’s tasks, things to prepare, and unresolved worries keep looping. You tell yourself you will think about it in the morning, yet the unease does not leave. When

일을 미루지 않는 방법: 미니멀 태스크

일을 미루지 않는 방법: 미니멀 태스크

사람들은 해마다 새로운 목표와 계획을 세웁니다. 그러나 신년이 지나고, 설이 지나면 “3월부터 다시 시작하자”라는 식으로 계획이 미뤄지거나, 바쁜 일상 속에서 어느새 흐지부지되어 버리는 경우가 많습니다. 왜 이런 일이 반복될까요? 예능 프로그램 유 퀴즈 온 더 블록에 출연한 연세대학교 심리학과 상담심리전공 이동귀 교수의 이야기에서 힌트를 찾을 수 있습니다. 이동귀 교수는

Plan-Do-Check-Act: A PDCA Time Management Guide

Plan-Do-Check-Act: A PDCA Time Management Guide

Many of us end the day with a full calendar yet leave the important work unfinished. Plans multiply, execution lags, and the list grows while the done column stays thin. Among many planning methods, the PDCA cycle stands out for its simplicity and power. PDCA stands for Plan, Do, Check,

The Multitasking Trap That Drains Productivity

The Multitasking Trap That Drains Productivity

A modern workday is scored by constant pings. More than twenty Slack channels, client specific email labels, fresh Jira project rooms spun up on the fly, and four new channels added in the past two weeks. It can feel like you are a call center agent juggling dozens of conversations

Energy Mapping: A Time Management Aligned with Your Body’s Rhythm

Energy Mapping: A Time Management Aligned with Your Body’s Rhythm

There is a resource as precious as time. It is your energy. When you use energy wisely, you can sustain high performance and real growth. Pour that energy into the wrong work at the wrong time, though, and stress builds, burnout follows, overall productivity drops, and even your health can

Start Managing Your Time with a Time Log

Start Managing Your Time with a Time Log

We all have the same 24 hours in a day. So why do some people accomplish more with the same amount of time? Peter Drucker lays out the essentials of time management in Managing Oneself. 1. Time diagnosis: Are you directing your hours, or drifting through them? Many of us

Less but Better: The Power of Essentialism

Less but Better: The Power of Essentialism

How often do we lose sight of what is essential? We work hard within the time we have. Yet is that effort truly aimed at the essential, or are we spending energy on what does not matter? A short checklist can help you take stock. How many items would apply

Time Management Guide for Solopreneurs

Time Management Guide for Solopreneurs

A solopreneur is someone who runs an entire business alone. The term may sound new, but the idea has long existed in the form of one-person businesses, freelancers, or people juggling multiple jobs. What distinguishes a solopreneur is not just working solo, but building and growing a business on the

Planning vs. Doing: Reduce Attention-Switching Costs

Planning vs. Doing: Reduce Attention-Switching Costs

At work, we often spend substantial time planning, only to struggle in the execution stage. You might lead an important project, build a thorough plan through multiple meetings, and prepare all the materials—then encounter unforeseen variables once execution begins and watch the plan slip. Even when you have listed

PM에게 세컨드 브레인이 필요한 이유

PM에게 세컨드 브레인이 필요한 이유

PM은 해야 할 일도 많고 관리해야 할 사람도 많습니다. 여기에 추가로 2개 이상 프로젝트를 담당하다 보면 이 어려움이 두 배, 세 배로 늘어나게 됩니다. 가중되는 어려움으로 주의가 흐트러지고, 업무를 자주 빠뜨립니다. 최선을 다해 노력하면 가장 중요한 일은 잊지 않을 수 있지만, 동료들이 완료 여부를 물어볼때서야 챙기게 되는 일이 많아지면서 내가

Why Product Managers Need a Second Brain

Why Product Managers Need a Second Brain

Product managers juggle a lot—many tasks, many people. Add two or more concurrent projects and the difficulty multiplies. Attention scatters, important items slip, and you only chase them when a teammate asks for a status update. You start to feel like the bottleneck. Being the ultra-organized, never-miss-a-thing type is

Building Your Own Morning Routine with a Calendar

Building Your Own Morning Routine with a Calendar

People are increasingly looking for ways to use their mornings intentionally rather than letting them slip by. You can see it in the rise of habit-building apps and local groups that meet to practice early-morning routines together. Goals differ from person to person, but building a consistent morning routine has

프리랜서를 위한 생산적인 일정관리 가이드

프리랜서를 위한 생산적인 일정관리 가이드

특정 회사에 속하지 않고 프리랜서로 활동하는 분들이 점점 더 많아지고 있습니다. 프리랜서 디자이너나 개발자뿐만 아니라 프리랜서 PM, 기획자, 마케터, 편집자 등 프리랜서를 채용하는 직군도 더 다양해지고 있습니다. 프리랜서는 자유로운 업무 형태를 갖고 있기 때문에 본인의 시간을 주도적으로 활용하여 생산적으로 일할 수 있습니다. 그러나 많은 프리랜서 분들이 업무에 대한 주도권을 갖지

생산적인 재택근무를 위한 일정관리 가이드

생산적인 재택근무를 위한 일정관리 가이드

한 공간에 모여서 함께 일해야 생산적으로 업무를 할 수 있다고 생각해 왔습니다. 그러나 2019년 팬데믹 이후 재택근무는 하나의 업무 흐름으로 자리 잡았고 재택근무으로도 충분히 생산적으로 일할 수 있음을 경험하였습니다. 그러나 최근 팬데믹 종료 이후 다시 사무실 출근으로 복귀하거나 사무실 출근과 재택근무를 병행하는 하이브리드 업무 방식을 주변에서 심심치 않게 다시 볼

ADHD를 겪는 분들을 위한 일정관리 가이드

ADHD를 겪는 분들을 위한 일정관리 가이드

해야 할 일을 자주 까먹는다. 업무에 집중을 하지 못한다. 마무리를 하는데 어려움을 겪는다. 잦은 싫증을 느낀다. 필요한 일을 순서대로 진행하기 어렵다. 실수를 저지르지 않기 위해 지나치게 완벽주의적 성향을 갖고 있다. 일정관리에 어려움을 느낀다. 이러한 증상들은 성인 ADHD(Attention Deficit Hyperactivity Disorder)의 대표적인 증상들입니다. ADHD란 지속적으로 주의력이 부족하여 산만하고 과다활동,