I recently found out about a great product for riding during these cold winter months - the "Bit Blanket!" If you're horse was like mine, he started getting very fussy whenever I tried to bridle him in the winter. I tried warming up the bit inside my jacket or by rubbing it, but it was time consuming and wasn't all that helpful - plus MY hands got cold! The Bit Blanket was the perfect answer - just plug it in and wrap the bit (just leave it attached to the bridle) and soon you'll have a nice, comfy bit. Just found out that they now also have an adapter so you can plug it in your car and arrive at the barn with a toasty bit. You can get them at: http://www.bitblanket.com
Definitely worth it to keep your horse happy during the winter!