I keep hearing this book is a must-read: http://www.feld.com/wp/archives/2011/07/venture-deals-be-sma... If you don't want to buy it, you should check out the Venture Hacks Bible: http://venturehacks.com/friends I'm not sure any of them mentions SAFEs because they're very recent, you can read more details in YC's announcement: http://ycombinator.com/safe/