Stalled Printer Repair
Sometimes print jobs get stuck in the queue, and it's not always obvious why. It could be the result of a driver issue, it could be because you're using a Wi-Fi connection to the printer, and so forth. Even more vexing, Windows won't let you delete a stuck print job, which blocks subsequent items from printing. Usually the only solution is a reboot, and no one should have to endure that kind of a hassle just to print a document. Salvation! Stalled Printer Repair is a free utility that purges any stuck jobs it finds, meaning you should be able to resume printing again right away.
What I especially like about SPR is that there's nothing to install (if you download the Zip-file version, that is): Just run the app, click Purge Print Jobs, and you're done. That makes this a perfect addition to the USB Flash drive you use for system-rescue utilities. (You do have one, right?)
If you've been plagued by stuck print jobs, I definitely recommend giving Stalled Printer Repair a try.