I've always been chronically online, I want to start writing down the random shit I remember so I can come back and detail it. More to come as my brain remembers.
Koei forums
IGN forums
YTMND
AIM
Yahoo - messenger and answers
Neopets
Newgrounds
Habbo hotel
Flash
Salad Fingers
Charlie the Unicorn
Early meme days
Gamefaqs
Digg
Early Reddit
StumbleUpon
Myspace
End of Ze World
Other early Youtube
Steve Irwin
Dial up sounds
Cd players
Memory cards
Phonebooks and encyclopedias
Early Mp3 players
Specific flash games, tower defenses, line rider
flame shirts on picture day
Limewire
old phones
last.fm
weebl
Homestar Runner
You've got mail
Photobucket
epic fails
Cracked
lolcats
Ultimate showdown
Chocolate rain
Numa numa
Chuck Norris
lolrandom core
Leeroy Jenkins
Over 9000
Shoop da whoop
FPS Doug
Epic, pwned, leetspeak
Freddie fish disc
Red vs blue
Pizza hut buffets and the red cups
Yahoo ruins everything it touches, including Geocities and Tumblr
Angelfire
Happy Tree Friends
CS: Source and my favorite map, CS Office
School memories - so many, will need its own post
Ebaums