Keep your feet warm and dry. Powder, socks, shoes yes even indoors. You can lose a lot of heat walking on cold tile floors.
See if your neighbors have natural gas/propane or wood heat. Ask if they would be willing to give you some hot water in a thermos or even allow you to come over and cook.
Be sure to offer to pay! If they refuse to take payment be sure to do something very nice for them.
My neighbor does some yard work and snow shoveling for me and I pay him in baked goods!
It works for us.