20.On his favorite book when he was a teen, The Hitchhiker’s Guide to the Galaxy: “It taught me that the tough thing is figuring out what questions to ask, but that once you do that, the rest is really easy.” Here’s my favorite part of The Hitchhiker’s Guide to the Galaxy: the idea that all you really need from a materialistic perspective is a towel. Hygiene is key. Then the universe sort of takes care of things after that.