Failure
I got partway writing through my post last night, but it turned out to be significantly longer than I expected. This has happened a couple of times and normally I just eventually cut my losses and start over with something shorter, but I ran out of time to do that.
I usually have some idea of what will turn out to be a long post rather than a short one, so I think the right way to prevent this in future is to give those some consideration in advance, and maybe set aside time specifically for the ones that will be longer. I have a few half-finished longer posts from earlier, so I think it would be helpful for resurrecting those as well.