I recently picked up Antifragile by Nassim Nicholas Taleb. He's a very interesting guy. If you've never read him before, you might want to start with Fooled by Randomness.

I also have this one, but have not had a chance to read it yet:

Amazon.com: The Power of Habit: Why We Do What We Do in Life and Business (3520700000553): Charles Duhigg: Books