An appeal for help

I'm slightly panicy that a few people have recently started following me on twitter. I haven't logged in for months. The truth is, I don't really know how to use it. Not technically, but functionally. It's like sitting in front of piano and not knowing what to play. I signed up just to see what all the fuss was about but all I really did was broadcast my new blog posts. Surely there's more to it than that? If anyone has any tips or suggestions on how to make the most of it, please let me know. And if you're one of the poor wretches that decided to follow me, don't give up on me just yet :)