Mudbunny has some useful advice:
0. Do NOT under any circumstances whatsoever tempt fate.
1. When it appears that you have killed the monster, NEVER check to see if
it’s really dead.
2. Never read a book of demon summoning aloud, even as a joke.
3. Do not search the basement, especially if the power has gone out.
3a. Or closets or attics for that matter.
4. If your children speak to you in Latin or any other language which they
should not know, shoot them immediately. It will save you a lot of grief in
the long run. However, it will probably take several rounds to kill them, so
be prepared. This also applies to kids who speak with somebody else’s voice.
Find these and twenty more useful tips at Have a happy and safe Halloween