[Higgy]

One of the best things you can do for your basement is to insulate, at least, the inside walls around the entire perimeter. Even if you will never finish your basement, insulating the inside walls of the outer perimeter of your basement will lower your heating bills quite a bit. And the other thing you can do once the insulation is done around the outer walls is to put insulation right into the top part of the wall where the concrete and the actual house meet. You could spray that expanding foam around the seams and then just fill the rest in with regular insulation. It will make it a lot more bareable to go into the basement and your furnace won't have to work as hard to heat the rest of the house.