[bocephus]

There is a youtube video from Matt Collville where he lays out a simple dungeon encounter, I think its called a 3 room dungeon, or 5 step or something like that.

Its a good simple story, lure the PCs to an old mausoleum where some goblins have taken up shop and have brought the maguffin the PCs seek. Theres a guarded entrance, a room/encounter, a trap, a boss and potential treasure if they find the secret (and another potential encounter if you like).

Easier to look at his video, its one of his first in "running the game". Its D&D centric but easily converted to GURPS or DFRPG. I have used it several times in ongoing campaigns just to have a quick side bar or interesting diversion.