I began my last entry (about adopting pigs) on Friday evening, poked at it over the weekend, and finished it last night. Doing this, I've come across a couple of quirks in the LiveJournal software, which may be of interest to other people.
a) The "restore from saved draft" option only applies when you're creating a new post, not editing an existing one. That's rather annoying if your web browser crashes and you lose a couple of hours of work! It's easy enough to avoid, by saving (posting) repeatedly, but you need to be aware of that.
b) The date/time when you actually post it the first time seems to take priority over the values you specify. In this case, even though the entry is labelled as 02:15 on 21-Jan-2008, I think it's been stored internally as something like 18:00 on 18-Jan-2008. In practical terms, this means that most of you probably didn't see it (unless you came straight to my LJ), since it would be 2 or 3 pages back in your friends list. I'm not sure whether the "date out of order" option would be useful here; I don't think so, but I've never actually used it.
I normally prepare entries offline (e.g. in Notepad), so that may be the best approach from now on, if a post is too long/complex to be written in one go. As for my previous post, I'm not fishing for comments, but feel free to read it if you missed it the first time around.