To keep the thread from getting unwound (on spools that don't have the place to wind the end), I use a product called (I think) thread socks. It's a long piece of stretchy mesh and you can cut off a piece about 1" or so, and it stretches out to go over the spool and keep the thread in place. One package will do several spools. I don't remember where I got it, but if I see it again, I'll buy several packs. It's wonderful.