30 Days of Game Mastering Challenge, etcetera and so on.

How do you prep for each session?

I know there are GMs out there that maybe don’t do a lot of prep between sessions. I respect GMs that can really work on the fly, because I am not one of them. I’ve gotten better at improv over the years, but I still need to do a minimum amount of prep in order to feel confident going into a session.

The very first thing I do is go over my session notes from the previous session. I’m looking for anything I said I’d have done by next session (XP totals, treasure lists, and so on). I’m also looking for any NPCs I might have to prep, and any indications of where my players are going next. Sometimes that’s straightforward; they’re still in the dungeon, so they’ll stay in the dungeon. Sometimes they have a bunch of options, though, and hopefully I noted which one they were leaning towards at the previous session.

Once I’ve gone over my notes I start putting together the things I might need for the session: NPC stats, location info, results for Knowledge checks. I read over the next portions of the adventure a few times to get familiar with them, assuming I’m using a pre-written adventure. If not, I review my adventure notes, and fill in any blanks I might need for the next session. I also assemble the physical items I’ll need for the next several encounters, like miniatures, maps, and player handouts. I like to have those things ready to go so I don’t waste playing time fumbling or searching for them.

I usually prepare one more encounter than I think I’ll need, and often two. Sometimes the players go in a direction you weren’t expecting and it’s great to be prepared for that. And sometimes the players breeze through an encounter you thought was going to take longer or be tougher. Either way, it’s good to be ready with the next, or alternate, encounter so they aren’t waiting for you to catch up.

About an hour or so before the session starts I prepare the playing space. I anoint the four sacred corners with the sacrificial blood…just kidding. A little Old Gamer “D&D is satanism” humour. But I do tidy up the play area, removing any distractions. I set up my end of the table with all my GMing tools close to hand. I set out the players’ minis, the map sheet we’re using, and character sheets if I held on to them. And I set out the snack bowls so we don’t have to waste time hunting for those later in the game.

One thing that I started doing fairly recently, I pre-roll about 15-20 times on a d20 (assuming we’re playing Pathfinder; I pre-roll for other games as appropriate) and note the results. This speeds up things like NPC/monster saving throws, skill checks, and surprise attack rolls a great deal. I use the same numbers for player checks when I need the check to be secret; for instance, an elven character’s Perception check for a secret door. This is useful, because sometimes you don’t want to give the game away by rolling a d20. Some players can’t help meta-gaming, and pre-rolling avoids that issue.

On my laptop, I open up the PDFs of all the resources I’ll need during the session, and bookmark the pages I’ll need for reference. As part of my NPC prep I’ll have noted any spells and abilities that were not familiar to me, and I’ll have those pages open as reference. If for some reason I’m not using my laptop (rare, but it happens), I use sticky notes to tab all the pages I’ll need as reference. Either way, I want to cut down on the amount of fumbling through books I have to do during play. Not only does it cut down on wasted time, but you come across as a more confident and in-control GM.

Then I sit back, sip my coffee, and wait for the players to arrive.

What do you do before each session? Leave your prep routine in the comments.