Game Master's Quick Reference

The Game Master's Quick Reference is a bookmark packed with short random tables covering a variety of things a Game Master might need on short notice at the table. With a roll of a d6, quickly generate NPC names and personalities, pocket contents, oddities, and more! While not exhaustive, the Game Master's Quick Reference will get you through the session and let you flesh out your choice later. System neutral, but with a slight bias towards fantasy settings.

You can find more GM and player tips and tricks at Renaissance Gamer.