A real life application... Decision Maker is one of the most useful Mathematica programs I have ever written. It came about because it was a cold and rainy day: I didn't feel like riding my bike home from work, taking the bus would take a long time, and it would be humiliating to ask for a ride. What to do? I couldn't decide, but Decision Maker could:

RandomChoice[{"ride bike", "take bus", "find ride"}]

I have often found myself using different versions of this program when I need help with decisions. I think this makes me (about) a level -5 user.