Best Tinderbox point at EdBlogger: it's very important, when writing a weblog, to have several different containers of unpublished material. I have one for half-formed ideas, another for posts in composition. A third bin holds posts I think are ready to publish, but that I'm saving for the ideal moment. Another bin holds writing that I now think is too inflammatory to post, but nonetheless too good to discard.
I'd never thought about this, until people started to discuss revision and editing in the classroom weblog environment.