Buy books. Lotsa lotsa books.

A great passage from the book I'm currently reading - The Little Guide To Your Well-Read Life by Steve Leveen:

John Armato a public relations executive, cherishes his growing Library of Candidates. When people ask him if he's actually read all those books, he asks them if they've actually eaten all the food in their kitchen. "It is good to put up a supply of books; it increases the odds that you'll have what you want when you're hungry for it," he says.