How do i make sure i never get a prion disease? saw something about it on tv and they look horrifying

Don't think about it: Prion disease is extremely rare. Classic cases are usually genetic or having to do with cannibalism. Mad cow disease causing human prion disease is a possibility but it is not well established. One can eliminate meat from diet but there is no way to ensure you won't get it. It is out of your control so relax and don't let something like this stop you from living.