You’re Going to Be Fine
The biggest secret about DMing? Your players don’t know what you planned. If you improvise and it goes differently than expected, that’s not failure — that’s D&D working as intended.
Preparation Checklist
What You Actually Need
- A starting situation (not a plot — a situation)
- 3-5 NPC names you can pull from
- A simple combat encounter ready to go
- A rough idea of where things might lead next session
- Snacks (seriously, this matters)
What You Don’t Need
- A fully mapped dungeon
- Every NPC’s backstory
- Rules memorized perfectly
- Voices and accents
- A plan for the entire campaign
The First 30 Minutes
Start the session with the characters already together and already in an interesting situation. Skip the “you all meet in a tavern” and jump straight to action.
Good openers:
- “You’re mid-chase through the market district. What are you chasing?”
- “The caravan you’ve been guarding just hit a collapsed bridge. What do you do?”
- “You wake up in a cell. You don’t remember how you got here.”
When You Don’t Know a Rule
Say: “I’m going to make a quick ruling so we can keep playing. We’ll look up the exact rule after the session.”
Then make a reasonable call:
- If it should be easy, DC 10
- If it should be moderate, DC 15
- If it should be hard, DC 20
This covers 90% of situations.
After the Session
Ask your players two questions:
- What was your favorite moment?
- Is there anything you want to do more of?
Their answers will guide your prep better than any advice article.