I'm newly a HH owner myself and the best tip I've used so far is to pick up one of those jumbo sun shades from Wally World that you would put in your truck window to keep it cool. It will reflect your body heat back to you and keep you toasty warm.
Also read the forum and watch some of Shugs videos on YouTube.
Shug, you crack me up to no end. I think you are my fathers long lost twin!