Another cool Blogger draft feature is the one I'm trying out right now, a new post editor. This one is based on the same technology as Google Docs, meaning a smoother experience and faster iterations in the future.
For me personally, one particularly nice thing is to be able to 'fix' the compose settings so that the editor doesn't try to interpret <b>angle brackets</b> <entry>of any kind</entry> as active markup. If you need to talk about XML and HTML, this is kinda important :). This is available under "Post Options".