- 
There are things that, if I spend 2-3 hours thoroughly researching and learning about, could have a positive impact on my entire life.
- Even if I end up not understanding anything after researching, it’s only a few hours wasted.
 - If I can gain valuable knowledge from my research, it will be beneficial for a long time.
- The upside is very significant.
 - It’s similar to Things that leverage life experiences.
 
 
 - 
Here are some things I want to research because I don’t understand them:
- The mechanism of human concentration.
 - Methods for better sleep.
- I want to know the conditions that make it easier to fall asleep. (It’s a topic of discussion among friends) [takker]
 
 - Proper way to brush teeth.
- You can learn this by going for regular dental check-ups. [takker]
- I wonder if I should have done this too. [tkgshn]
 
 - There are also useful notes on this topic at /motoso/ [基素]‘s place.
 
 - You can learn this by going for regular dental check-ups. [takker]
 - Walking and posture.
- There’s a special feature on walking techniques in a mountaineering magazine. [takker]
- Although it may not be directly applicable to everyday walking.
 
 
 - There’s a special feature on walking techniques in a mountaineering magazine. [takker]
 - Expressions and how to smile.
 - Speaking style, vocal quality, and laughter.
 - Things that a leader should do as a minimum/absolute things to avoid. [takker]