This document provides advice and lessons learned from Dave McClure's experience as an angel investor and founder of 500 Startups accelerator. It outlines the key steps needed to successfully invest as an angel, including having sufficient capital, deal flow, expertise in evaluation and negotiations, support for portfolio companies, and connections for follow-on funding. McClure discusses his early investments from 2004-2008, noting most failures but a few large exits. The document also provides tips for new angel investors and what it takes to run a successful accelerator, including funding, branding, programs/services, deal flow, mentors, downstream capital, and proof points from past wins.