That can't have been to difficult. Just die and don't be happy about it? Or is it like, lich level complexity, find x item, build a phylactery, sacrifice a cow?
Actually, it's between those two extremes.
Before I go any further, I'm gonna say that I obviously don't think this works and won't try it out any time soon. All this information came from a book in my dream. Here goes:
First off, you'll have to want to not pass on to whatever's next after life(my dream didn't go into detail of what it was). Most ghosts are made on accident, and they usually died in a violent and painful way which caused them to not want to pass on because they were so caught up in the situation they didn't notice they were dead (according to my dream) or they had something to do that prevents them from going forth. So what you've got to do first is have the right mindset, or ethereal you just won't "stick" to this world. It'll slip away. Now, just not wanting to pass on isn't enough, obviously, or ghosts would be everywhere. Most of the in-depth stuff comes in to try and make the correct environment so your ethereal essence can "stick." It involves some fire/ice and some water, and killing yourself in such a manner as to have a kind of residual spiritual energy after you're dead.
Apparently, the law of conservation of energy also works on souls, you're also gonna have to feed your ethereal body somehow if you actually want to be able to do something. This involves subtle manipulation of the environment in your ethereal form to try and feed off of the souls of the living (amazingly, you don't actually eat the soul, at least not if you have any morality at all; you feed off of what souls produce).
Yeah, my dream went into some detail. It was pretty interesting, if not obviously fictional. OR IS IT? :ninja:
Either way, I'm certainly not killing myself oto find out.