For the GMs out there, how much do you prep for each session? I've found myself the last couple weeks either prepping too much and having a lot of useless stuff on my hands, or prepping too little and having to improv more than I would normally like.
This week alone I gave myself a pretty narrow list of things to prepare, but then found myself getting hung up on all sorts of small details that aren't relevant. The best part is I'm only 25% sure the entire area I got hung up on will be seen by the players. Which is fine. The information will never be totally useless - regardless of my first paragraph - because it can always come up again later on.
I'm going into the session with a few encounters, a couple areas, and no idea if any of them will be relevant. At least one of the areas won't be used on a best case scenario. Still, aside from some of the minutiae details I spent a bit too much time on, I think I'm fairly well prepared with this.
What about you though? How much do you prepare? Do you over prepare? Do you purposely under prepare and just give yourself a few ideas?