Guidelines for Good Angel Investing:
In 2014, I taught a small class about angel investing, it covers most of what I've learned in my first few years of investing. I've posted most of our class material on this site in hope that it can be helpful to you too.
Teaching that class was fun. I taught 8 students over one year. Ultimately, the lectures convinced several people that investing wasn't for them at this time (which I consider a win; being realistic about the risks before investing is very important).
There were also 3 of the 8 people that decided to start investing in earnest, and are still happy with that decision a few years later.
I hope to teach the class again in a few years.