Jeff Rients is trying something interesting with his current campaign: he’s letting his players ask questions about the setting via email, and incorporating the answers (which he provides) into the game.

As Jeff says, “So far I really like this approach, as it forces me to think in directions maybe I wouldn’t explore myself and it let’s me know what interests my players.

This sounds like a pretty cool worldbuilding technique to me: low prep, promotes player buy-in, encourages creativity and helps you take your game in new directions. Have you ever tried something like this?