rueger writes "At various times during the day I need a quick break from serious work. Browsing the 'net is not a good choice because it invariably winds up consuming an hour on places like Slashdot, so right now that means my break is a game of Solitaire. Loads in seconds, takes maybe a minute to play, then back to stuff that matters. I'm wondering what other goodies could fill that role — maybe games, maybe something that actually leads to knowledge, skills, or a measurable output? Think of it as an on-screen micro-hobby. Any Ideas?"