I am a huge fan of the Fallout series and my favorite thing to do was sabotage large groups of enemy NPCs. I would set mines and traps all around in key places, then throw a grenade in a group of enemies. The one's that survived ran trying to find me only to die from the traps I set. I really added a lot to the strategy of the game.
In Skyrim this does not really seem to be an option. Can anyone give me any suggestions as to how one might go about doing something like this, if it is even possible.

Or maybe dropping oil jugs and setting them off with a flaming arrow.