8. One of the most universal causes of self-doubt and depression: trying to impress people you don't like.

Stressing to impress is fine, but do it for the right people - those you want to emulate.

4. Information is useless if it is not applied to something important or you will forget it before you have a chance to apply it.

5. A person's success in life can usually be measured by the number of uncomfortable conversations he or she is willing to have.

Twitter account @Mindset_Machine shared his thread about 10 lessons from the book "The 4-Hour Workweek"

6. We are the average of the five people we associate with most, so do not underestimate the effects of our pessimistic and unambitious friends.

If someone isn't making you stronger, they're making you weaker.

2. To enjoy life, you don't need fancy nonsenseBut you do need to control your time and realize that most things just aren't as serious as you make them out to be.

9. Remember: There is a direct correlation between an increased sphere of comfort and getting what you want.

7. It's lonely at the top.

99% of people in the world are convinced they are incapable of achieving great things, so they aim for the mediocre.

The level of competition is thus fiercest for 'realistic' goals, making them the most time and energy-consuming.

3. Learn to be difficult when it countsIn school or in life, having a reputation for being assertive will help you receive preferential treatment without having to beg or fight for it every time.