I do few of many things:
Play Srb2.
Do some coding. (Mainly on SSBSS109 (AKA DMSC), SRB2109BOMB (Super Bomberman Blast 2) and my own private EXEs at times)
Sleep.
Make/Edit some maps.
Fiddle around with wads.
Play Gens, No$GBA, and sometimes even MUGEN.
Go on google and search for random things.
Go on youtube and look for funny videos.
Go on Newgrounds to see some good flashes.
Talk to random people on IRC, mainly Velocity.
Fantasise and do things related to that. (You probably know what I mean... ^_~)
Make sound files which I think are quite funny.
Play my Nintendo Wii.
Watch TV.
I could go on...