Found a good post on mashable.com that lists 50+ WordPress plug-ins that come in handy for site administrators. Go read it. Amazingly, I use a bunch of good plug-ins but I did not use even one of those recommended by Mashable. Some of them are a bit lame … the 404-checker sounds really good on the surface of it, though I haven’t figured out why a WordPress page would ever go 404 because they’re basically manufactured on-the-fly.
One that really does sound useful is the Instant-upgrade plug-in, that permits you to perform a WP upgrade automatically with a single click. WP upgrades generally take me around 5 minutes per site to perform and I do about 20 of them each time WP clicks over to the next version, so this could save me a couple of hours here and there! (It requires careful setup by a server admin, but looks like it probably does things correctly.)