There’s a lot of commercial technology out there intended to improve our quality of life (in a sense, almost all of it). A speaker @ Bay Area Maker Day mentioned a few devices she found effective for modifying her own behavior –
Sleeptracker watch – wakes you at the end of the REM cycle closest to your ideal wake up time.
StressEraser – Breathing regulation device
Motivaider – simple vibrating reminder device with timer.
These are relatively simple and are apparently handy for tweaking the human machine – they also seem quite easy to emulate/incorporate into your own design or interface.