I get cold in a flash, so I invested in *serious* winter footgear a couple of years ago, including:

** Sidi winter boots (on sale) [but not the super-duper Diablo model]

** Sealskinz socks with the fleece lining.

** Sidi Toasters (battery-operated heated insoles), nabbed at half price two winters ago. Worth every penny. I wear them for hiking and walking zeee dog, too. Good for about 3 hours in really, really cold and windy temps.

**Wool, wool, wool, from the top of my head to the tips of my toes.

** If it's not frigid, I'll skip the boots and wear my regular Sidi shoes with Louis Garneau toe covers---the ones with the heel straps.

Can you tell I have a horror of being frozen?

I use the Heat Grabber chem packs in my gloves, but not in my shoes/boots. The packs make an amazing difference in whether I'm focused on enjoying my ride or on how soon I can get back to my truck to thaw out achingly cold fingers.