I want to start angel investing with revenue I'm generating from my business: how do I find good startups to invest in?

I have a B2B application that is starting to generate a good amount of profit. Since I don't have any investors and reinvesting as much as I can already to grow my business, I want to start investing in other startups as an angel investor.

Angel investing is completely new territory to me and the key thing I'm having a tough time with is sourcing good startups. How do I find great startups to invest in -- or, better yet, have successful founders find me?

Two issues to consider:

1. Make sure the angel investments are done by you personally, not your company. This means that your company should pay you (salary, dividends) first, then with your newfound personal money, feel free to become an angel investor
2. You should create an account on AngelList (angel.co). The recommendation for new angels is to attach themselves to more famous angels, who have access to the great deal flow. AngelList has a syndicate feature that you'd want to look into.