Fogman

There are going to be times when it's dangerous to walk around outside, so it's helpful on the first day to prepare either a bed, or things you can do at night. Clay forming and stone tool knapping are good ways to efficiently use the indoor hours early on, but if you cannot find clay, and you already have many extra stone tools prepared, it isn't a bad idea to pass the night by sleeping in a straw bed to save real time.