Many authority's recommend a small pause (1 ? 2 minutes) per hour of computer work.

Reflexion is a tinny application that prompts you kindly when it is time for a pause.

It runs in the windows notification area (also known as tray area).

You can set the start- and stop time and the number of pauses you like.

A list is dynamically updated and showing all the pause occurences.

Optionaly one can play a sound (wav), mp3 or wma file to prelude the pause.