My TiVo and most of my computers will take care of that themselves. My VCRs never use their timers any more, but I'll change the clocks anyway. Bedroom clocks, watches, and car clock are what I'll have to remember to hit!
While you're at it, change your smoke detector batteries this weekend! Don't wait for them to beep a low-battery warning, since you might be out of the house and miss however many hours they manage to chirp. Every time the clocks change, change the batteries!