Also accomplished this weekend: I upgraded our TiVo from a 30-hour capacity to a 150-hour capacity. 150 hours. Of television.

The TiVo hacking community has got the upgrading procedure down to a few simple steps, and Hinsdale's guide mentions everything you'll need. That said, I'm grateful I had the absolute simplest configuration (a DirecTiVo with only one hard drive in it), and even then it was a pain getting my desktop computer (actually one of my servers) to work with the new drive. The ancient BIOS didn't like the huge drive much at all, but thankfully I figured out the boot disk could see it even if the BIOS couldn't. Also, the simple instructions assume you a) have a desktop PC, and b) that PC's main operating system is Windows. I'm sure it's possible to back up your TiVo to non-Windows OSes, but I so desperately wanted this to be a simple procedure that I just didn't do the back-up. Probably not a smart thing to do, but it all worked out in the end.

I can automatically record every episode of Star Trek. Twice.