Sunday November 6th, 2011 at 0200 hours [that's 2:00 a.m. to most], your clocks will have to “fall back” one hour. So 2 becomes 1. It would probably work just the same to set them back one hour before you go to bed Saturday night [tonight].
Now is an excellent time to check your smoke alarms and carbon monoxide detectors, as well as other household battery-powered emergency alarm systems.
Finally, be sure to update the clocks in your automobiles. Be safe driving until you adjust to the light conditions, and enjoy sleeping in Sunday morning!