After you've lived with your personal demons for a while, it's pretty easy to get to know them. Sure, they can get nasty sometimes, but once you figure out how predictable they are, they're actually quite adorable... right?
For my own contribution to the field of Demonology, I made a little primer out of mine, featuring many of their well-worn phrases. (I'm sure that the original edition of the Advanced Dungeons & Dragons Monster Manual had something to do with it as well.)