My three favorites lifehacks are:

1. Engage in your “fear practice” for two minutes each day.
2. Take the Enneagram test to better understand who you are.
3. Start to believe that we are all mini gods.

I found a total of 21 great habit ideas that improved life the most for the famous people that Ferriss interviewed. Here is the full list: https://www.mentorist.app/books/