Any tips on ghost possession?
Figure out if you're being controlled or tricked by something that isn't a ghost first. Chances are, there's either a person or something... close enough to being a person behind it.
If that is the case, then I've been told spontaneously fainting usually gets people off your back, unless you faint in a position where it'll get you killed instead. Apparently someone was doing that a few decades back?
If you're sure it's actually a ghost possessing you, then chances are it's feeding off of your emotions regarding death! Or something.
Regardless, either you give it what it wants or you flip your emotional switch off (again, fainting is an option here). Both tactics result in the thing either immediately leaving you alone or drastically escalating things! (aka whatever it would have done normally, but faster.)
Now, if you wanted tips about possessing things as a ghost, you'll have to ask someone else. I'm afraid I haven't been a spirit, or, if I have, I don't remember it. None of my NDEs have had funky ghost activity as far as I know.
Guys*, got any additional tips for our Anon asker?