Bone Fragments

If you dont have any use for the bone fragments, save them and make bone clubs. Bone clubs can be a really low end tool for breaking walls etc while inside a base if you want to offline raid and got out of supplies for explotion etc

Keep all bones in the early game if possible. Bone knives are nice for barrels but where they really shine is that a bone armor set gives 25% protection for only 30 cloth & 100 bones. If you have a bone knife or hatchet, every player you kill will give you 30 bones, including yourself. This means a 25% protection bone set will only take you harvesting 3.3 players for each.
Please note that a BURLAP set, not even accounting for wood armor, is 50 cloth, and is not yet 25% protection. By harvesting players, you're saving cloth, for things like bandages. Not to mention there is no need for rope or wood.
Another benefit to using bone armor sets is that the human meat you get from it. You get 5 human meat per player, but you only need to eat one cooked right after respawn, alongside a source of 100 comfort, to heal to 100 health without using a single bandage. Human meat dehydrates you, but you spawn with enough hydration for it to not matter if you eat just one.
If you kill someone who has, or find on your own, a bear skin rug, put it on the ceiling and sit right beneath the head area of it, for 100 comfort. However, if you can't find anyone holding onto a bear rug, the chair BP is 80 scrap to get to and research, and the craft cost is just 50 wood 75 frags.

Finally compost-able.