Newgrounds - Huge portal for animations, art and music. I check this every single day. (also because its my homepage). I post animations on there, I post music. Its great for feedback.
FluidAnims - A forum for animators and programmers. I have to check it multiple times a day, since I'm administrator. Its great fun and helpful for beginning animators, and a nice place to hang out, for the pro's.
Hotmail - Well, I got to check my e-mails obviously. I'm a busy guy.