If you're ever lucky enough to overhear chatter between enemy forces, it may just pay to listen to what they have to say, rather than leap out and attack them immediately.
This is assuming your GM is the sort who offers useful clues, rather than deceptive and dangerous misinformation...
Luke: We take a good look around.
Han: Search the room, good idea.
GM: Make a Spot check.
GM: Through the trees, you spy a couple of clone troopers standing by speeder bikes.
Trooper 1: ... from the Ewocs?
Trooper 2: Ewocs?
Trooper 1: It's on the invitation. E.W.O.C.
Han: I shoot—
Leia: Oh no you don't.
Han: Hey, that was going to be a good roll!
Leia: You've got to stop shooting first all the time.
Han: Well, they weren't shooting at us!