If you're not famous or providing a service, you've got no business using Twitter.
Most social networking sites have become nothing more than places for people to feel like the lead star in their own lives.
If you're Tweeting about getting breakfast, f*ck off. Do something productive.
Facebook, thankfully, can still be used primarily as a tool to keep in touch with people who don't have other tools you may use, like instant messengers or what not. People have started to use it like MySpace, though. Not using their real names, not using actual pictures.
It's dumb.
-AC