Pre-Generated Characters:
Use ready-made characters to jump straight into the action, ensuring immediate engagement without extensive character development.  Supply a couple more characters, ie. 8 chatcters for 6 players.

Single Theme:
Focus on one central theme or quest to keep the story cohesive and direct, avoiding complex subplots that can't be resolved quickly.

Straightforward Plot:
Design a simple, engaging plot with clear objectives for each session, leading to a satisfying conclusion within the limited timeframe.

Action and Momentum:
Keep the game moving with action-packed scenes and challenges, ensuring a fast pace to fit the short campaign structure.

Constrained Setting:
Set your adventure in a few well-defined locations to enhance depth without needing extensive world-building.

Clear Conclusion:
Plan a definitive ending that can be realistically achieved, providing a sense of closure and accomplishment for the players.