I waste alot of thread because I want a full bobbin when I start, I usually hold the thread and let the bobbin drop and roll until the bobbin is empty. I think I got drop and roll from teaching first aid and what do you do when you are on fire. Maybe I should buy some more thread. I really don't like when my thread colors don't match so I think that is why I get rid of the bit that is leftover on the bobbin.
I also get very messy when I sew, among other things (should see my desk), and I love to clean up the mess and be all tidy for a day or two, sometimes I make people look at my clean room.............