The world's oldest and most prestigious start-up accelerator is organizing training sessions for anyone who wants to get involved in early-stage investment as Angel Investors. Here are some helpful tips from Sam Altman, President of YC, which has assisted firms like Airbnb, Dropbox, and Stripe.
the fail rate doesn't matter, because if you have one company that grows x1000, you'll do fine
YC funded 1700 companies and just 5 of them account for 2/3 of their portfolio's value! And a single one = 1/3 of the value.