For any anons doing any spooky stuff I figured I'd make a quick little list of things we have confirmed when dealing with spirits and some things I suspect/read about but haven't seen confirmed
-bodies of water help deter evil or malevolent spirits
-salt is a purifier and deters evil/malevolent spirits
-silver can also serve this purpose
some scents and oils may also serve this purpose but I don't know of any off the top of my head
-some runes and symbols can act as protectioni think the Norse life rune is an example as well as Ammit heart and feather
-be careful when invoking/evoking names. a mispronunciation or other error may bring something you don't want to mess with
-for the love of all that is sacred and good in the world NEVER use blood for any rituals you perform.
If anyone wants to add anything or correct me feel free to