Tony Vargas
Legend
5e? With no prep at all. Just wing it. Frankly, I'm not sure prep is ever that worth it in traditional version of D&D. Hours of prep might result in a better session that none at all, 5 vs 15 vs an hr, maybe not - in classic D&D there was this expectation that the dungeon was all laid out in advance and the DM didn't improv anything as you went, though. That made DMing that much more tedious, but it's not like it was ever hard to fake being prepared. (I played in one campaign for a while before figuring out that the DM wasn't making secret surprise/notice type rolls, but just rolling up the dungeon out of the random generator in the 1e DMG as we went. Sounds lame, but it was as fun a game as any I was in back in the day, including ones that I prepped the hell out of.)Well thats what I did how would you run a game with 15 minutes of prep?
But, that's generally my style, in most games, I improv'd running Storyteller for years, even Champions! (which is insane, it's an absurdly detailed system, but I did it, consistently). 3e tempted me to prep, to actually write up the detailed monsters with feats and ranks that had become possible or to use CR, but it was a bear and not really worth it. 4e is the only game, this millennium, where the prep was worth it, and that only because it was so quick & easy - might as well spend a few minutes on it. :shrug:
There are some cases, though, where prep can be well worth it. A few sessions back I ran a fairly complicated encounter, well above the PC's paygrade, but with pre-planned ways of using skills to even the odds. It created a long, complex, neo-encounter that included interaction with NPCs (and the monsters, in a sense) and exploration (high-speed exploration on the combat time scale), with skill check vs fight a meaningful decision on many rounds. It was some significant prep, I had monsters, helpers, and NPCs all statted out and a 1-page hand-out describing the objective and generally how various skills could be used under the circumstances. It was very successful, but an exception to my usual style.