Awesome things:
Parazite - Fun.
autofish.net - Yeah. It has games, music, more music, and a lot more awesome things.

Movies:
internet cinematics

Webcomics:
User Friendly
Pixel - One of the few webcomics that are actually worth reading. Too bad it never updates.
XKCD - Everyone already knows about this, but I'll link to it anyway.
Colin the Brick - Another good webcomic that never updates anymore.

Games:
Liero - A game where you can live out your wildest fantasies of being a worm with a fucking massive gun. Also OpenLieroX
Liquid War - According to the site, you control an army of liquid and have to try and eat your opponents. I'm not entirely sure how you eat liquid. Freeze rays?

Music:
Mister Beep - One-bit music.
chiptune.com - Collection of tracked music. You'll need Javascript.
chiptunes.back2roots.org - Another collection of tracked (Adlib/MOD/YM) music.
ExoticA - Yet another tracked music collection, mostly of obscure formats that almost nobody uses. You'll need Deliplayer.
Mod Archive - Tracked music collection.
8bitpeoples - Chiptune mp3 site.
micromusic - Another chiptune mp3 site. Requires registration to download.
Stimmhorn - Alpenhorns, yodeling, and other fun things. Downloads here.

Cool people:
cr0m
Fleek
r0ms
rtil

Things I do when I'm not sitting at the computer:
CTY - Nerd camp.