Things to do to help you think?

Normally I just bounce a bouncy-ball up and down my kitchen to help me think (but I've lost it) about whatever I'm doing, usually I'm just writing a book or trying to solve some random murder I found on the internet (Which I always fail at mind you). I was just wondering if there's anything that would help me to think while trying to figure out these things. I used to play the violin but I found that horrifyingly boring after playing the same songs over and over.

Anyway, any idea's???