Today is game day! Instead of working, how about playing a game!
Warning, the following requires Shockwave:http://www.superdudes.net/games/terminal_decay/pop.php A 3D game where you navigate a ball around, and stuff.
http://i-am.org/amoebas.htm An Asteroids-like game where you dodge amoebas and paramecium.
http://www.pbs.org/kcts/videogamerevolution/arcade/name/name_that_game.swf This game plays you a sound effect from an old-school arcade game, and you have to guess which game it is from.
http://www.microsoft.com/typography/ctfonts/WordRecognition.aspx A study on how people recognize letters.
http://users.aristotle.net/~diogenes/meaning1.htm The meaning of life.