Badass

I'll read anything Kathy Sierra writes. I actually ordered this book when I was out of town, having it delivered to a hotel because I was looking forward to it that much. What I got was a book that inspired me to think differently about how I plan features, UX, and everything else for users.

What stuck with me the most was the concept of putting users into different “buckets” of ability on your product – beginners, intermediate and advanced. If you aren't moving users up in their abilities on multiple features at once, then people will leave your product. Thinking about things in this perspective was incredibly helpful for me.