Achieve-IT!: Tapping Your Superconscious: Da Vinci's Streamwriting technique - "Streamwriting is simply writing nonstop what is in your mind, unedited until your conscious mind gets out of the way and allows your superconscious to do the talking. Da Vinci used this method with his journals to solve specific problems and to seek answers that were otherwise hidden from his conscious experience."
Nice way of spending time on a Starbucks waiting for that friend that is-always-late. The other, more pragmatic approach, would be to develop a web application or anything more productive in a more conscious manner.
This link arrived via Marco.