Things I wish someone had told me before I started angel investing
I am realising that a weekly exercise on 'inversion' should be a must-do for founders/investors.Inversion essentially means think hard about: 
"What factors can cause my venture to fail?, How to avoid those factors?"This sounds simple but it could be a very powerful idea. 
https://www.farnamstreetblog.com/2013/10/inversion/