My husband had box of paperwork on the closet shelf beneath his shirts, one day we looked all over the house for TC, the cat, and found him curled up in the box, in the dark closet. Couldn't have been comfortable, but it seems to be his go to place. Took out the paper work and put in a shirt he still goes to it.
Found a box that had cotton ball packages in it at Wallyworld. Covered it with plastic and put a blanket in it. It's outside the front door. Sometimes we have two coming out on a chilly morning! I love my cats.