A former lab consultant of ours had gone on to make wonderful digital things (don’t they all). His name is Michael Highland and his creation is Awareness.His description: Awareness helps you become more aware of time spent on the computer by playing the sound of a singing bowl to mark every hour of continuous computer use. It also displays how long you’ve been using your computer without a break in the menu bar. $1.99 from the Apple store. Can’t beat Awareness. Thanks Mike!