Charlie Munger wrote a letter containing this list of Warren Buffett's eight reserved activities. My favorite one is: "His first priority would be reservation of much time for quiet reading and thinking, particularly that which might advance his determined learning, no matter how old he became." The post contains a list of all eight.
The Richest Man in Babylon is written in story form; fun to read and easy to understand regardless of your financial education. It's a concise book and hard to put down once you start reading. The key concept is "Money is plentiful for those who understand the simple laws which govern its acquisition."