Being a Game Master (GM) is a rewarding but challenging role. You’re responsible for crafting an engaging world, managing encounters, and keeping players entertained. But before the session begins, there’s the crucial task of preparation. How much prep is necessary? What should you focus on? Let’s break down a simple and effective approach to prepping for your next tabletop roleplaying game session.

We’ve been hearing a lot of talk about session prep on YouTube and TTRPG social media as of late. I suspect by people who want to perpetuate the myths that being a GM is scary or that there’s a GM shortage. We all know that’s hogwash by now. Just jump in and do the thing. It’s pretty easy.

1. Know Your Players and Their Characters

Every session should be tailored to your specific group. Take a few minutes to review:

  • Character backstories and motivations if such things are written down.
  • Ongoing personal quests or unresolved storylines that are in the immediate area or adventure. Sometimes we have to circle back to certain personal matters.
  • Player preferences—do they enjoy combat, intrigue, puzzles, or roleplay?

2. Review the Last Session

Refresh your memory on what happened last time:

  • Where did the session end?
  • What major events took place in game or outside of the characters’ bubble.
  • What unresolved plot threads or clues were left hanging? This helps create continuity and makes the world feel alive.

I like to keep a history log of previous sessions along with my notes. It’s just the date of the session, a one liner recap, how much XP was handed out, and anything important they might have skipped.

3. Outline the Core of the Session

Rather than scripting every detail, structure your session around key elements:

  • Main Objective: What is the primary goal for this session? (e.g., retrieve an artifact, negotiate with a faction, survive an ambush)
  • Encounters & Challenges: List possible conflicts, puzzles, or social interactions.
  • NPCs: Who might the players meet? Give them a name, a personality trait, and a goal.

4. Prepare Locations and Maps (If Needed)

You don’t need an intricate map for every room, but having a few locations roughly sketched out can be helpful. Whether it’s a mysterious ruin, a bustling city, or a shadowy forest, have a few details prepared:

  • General layout
  • Notable landmarks or environmental features
  • Secrets or hidden dangers

5. Have Some Random Elements Ready

Players love going off the rails, so prepare a few improvisational tools:

  • Random NPC names and descriptions. I suggest a long list of names for each kin in the game. Please remember to check off the ones you use in case you roll them again.
  • Random encounters that fit the setting
  • Unplanned but thematic complications (weather, rival factions, strange events)

6. Mechanics and Rules Refresher

If the session includes specific mechanics (e.g., naval combat, crafting, investigation rules), brush up on them ahead of time so you can keep the game moving smoothly. Try to keep notes of the rules you forget often on your GM screen if you have one. My problem areas are usually falling, drowning, grappling, and exhaustion.

7. Be Flexible and Ready to Adapt

No plan, no matter how well-thought out or intricate usually survives contact with the players. The best preparation is to be mentally flexible and open to improvisation. If they take an unexpected route, adapt and build upon what they’ve given you.

Final Thoughts

Game Master session prep doesn’t have to be overwhelming. Focus on what will make the session engaging and flow smoothly. With a little organization and a willingness to improvise, you’ll be ready to run a fantastic game for your players!

Thank you for being here with me today. I appreciate you. Keep it real, but please strive for positivity, too. Please embrace the things that bring you the most joy in your life.