Do you ride your bike in the winter? Do you still not know about handlebar mitts?
I nabbed a pair of these with some of the donations to the DD_* JS projects:
They look silly, but wow, they WORK. Pretty much anything that successfully keeps you warm looks silly. I can go without any gloves at 40 F, some thin full finger bike gloves at 32 F. For colder stuff, I wear winter gloves, and my hands stay absolutely pleased.