Podmods, Maintenance, Tips and Tricks : Central Florida Winterizing

We live in Tampa where historically, the lowest high temp. ever is in the mid-40's. We probably won't ever go to colder climes unless we winterize, but what do people do in this sort of climate? My feelings are that if it always gets at least 8-12 degrees above freezing during the day, do I need to winterize? I don't believe it's actually gotten below freezing in a few years.  

Thanks, -R