Do you use Twitter, and if so, how do you use it differently than Facebook?

I am considering using Twitter but want to know what the majority of others use it for. Do you use it to write status updates? Do you use it to follow others’ updates? Do you use it to receive breaking news? How is the way you use Twitter different from the way you use Facebook?

I don’t want to get involved in another social network if it’s going to duplicate one I use now. I don’t have time for that. What makes me curious about Twitter is that there’s a blog I used to follow, and I see that the blogger is no longer blogging but now can be found on Twitter daily, so that’s what brought me to this issue.