I recently stumbled across Twenty Sided Tale, a blog by Shamus Young, and found his series of comics entitled The DM of the Rings. It starts here, with DM of the Rings I, and fair warning: I nearly peed myself around number IX or so.
On top of being freaking hilarious, though, Shamus’s comics are full of truisms about GMing. No, seriously. Like, “No matter how difficult or absurd you make a puzzle, your players will find an even more impossible and preposterous way of solving it,” and “The DM will do a lot of talking, but if he’s not rolling the dice then what he’s saying is probably not important.”
Who hasn’t felt that way at one point or another, on either side of the screen?