No central heat + Boston winter = Many days I wish for a heated keyboard... not sure how you'd heat a trackball, but that would be appreciated as well!
Induction cooking.
A couple ways -- USB-powered electric gloves, combined with enough not-typing and cardio to make sure the blood's still flowing.
(Mozart and his wife, for example, used to dance in their cold apartment to keep warm.)
laptop's keyboard is pretty warm ... could save your cold, dead fingers