If you have anything personal of theirs, you could bind it into the paper or voodoo doll… or weave it into your hair, repeating that what they attempt to do to you will happen to them instead. This does tie you to them, though.
Take a lock of your own hair and make a dolly of it. Ask it to protect you and keep it in a safe place. That way, the negative energy lands on your hair instead of on you. I had to do this one, and it worked well for me.
@MeganB shared a wonderful trigger spell idea last year: