Things You'll Need
Instructions
Familiarize yourself with the rules of resolving actions and encounters. It disrupts the game when you have to constantly look things up.
Determine how many people are playing and what kinds of characters they will have in their adventuring party.
Figure out whether you want to run a one-shot game or one that lasts several game sessions.
Create a goal for the party. Do they need to kill a dragon and save a village? Are they seeking a certain magical item for someone? Have they been hired to assassinate a king?
Choose a setting. There are many AD&D worlds and time periods.
Make up a map of the land or dungeon so you know where the party is and where it's going. You may or may not want to share the map; many DMs have the players map as they explore.
Choose monsters and treasure for the monsters to guard. Mark the locations of the monsters, treasures and traps on your map.
Create puzzles for the players to figure out. Riddles and scavenger-hunt'type clues are popular.
Keep the characters on track. Guide them by using NPCs (non-player characters) to pass along clues and information.
Reward the party for a job well done. Magical equipment and gems are very popular spoils from a tough battle.