I have several thought outlets. One is Twitter which is everything in my head at any point in time dumped in 140 characters of less, Posterous is for my writings and opinions on technology, and the other is tumblr, for everything non tech that is more than 140 characters. Also Flickr for pictures.
To channel those thoughts, I send them to Facebook where I have a whole different audience. Also it allows more flexible commenting.
Unfortunately tumblr doesn’t seem to have a feature to send posts to Twitter so I’m using Posterous to send it. If this works, I’ll have a whole new respect for Posterous founders @garrytan and @a4agarwal.