How to Simplify Input with Steppers. I've always been a fan of Luke Wroblewski. He simplifies UI and input problems, and demonstrates why they shouldn't have been complicated in the first place.
Our mobile apps and touch screen systems are pretty good as they are, but they will be given the LukeW treatment in their next iteration. As we all know, there is always room for improvement.
See the entire series of videos, they're short and well worth your time, regardless of your industry.