The Red Cross has a good fact sheet on how to prevent frozen pipes.
Most of us probably have a few tried and true methods that have worked well in the past. Personally, I've done the whole "leave the faucet barely running" thing; this year, we also got to experience the fun of crawling underneath the house to wrap exposed outside faucet pipes in insulation (long story). What are your favorite ways to stave off the dreaded frozen pipes experience? Let us know in the comments.