Hat, vaseline, mitts (pound-shop "thinsulate" ones are great), Ginkgo biloba tea (according to St. Keith - haven't tried it myself, yet), handwarmers, and the humility to realise that a Nor'-Easter is Nature's way of telling you to stay in and coddle a whiskey.
A thermos jar of noodles with a thin cup that lets the heat through to your grateful paws can be a blessing, too.
Avoid tourniquets masquerading as neoprene mittens!
While we're about it, any ideas for the knees, folks? Thermal long-johns boil bits I'd sooner keep cool, neoprene knee bandages chafe like Ed's wellies in '63, and leg warmers always seem to be in "inappropriate" colours...