I managed to drag my ass out of that shithole in one piece, so I figure I'll give you a couple of quick tidbits of advice.
1) Never be the first guy to do something. Not first in the convoy, first into the room, first down the alley, first to take a shit.... Likewise, never be the last.
2) Surround yourself with people that look a good deal more important than you do. You're less likely to get shot if you look like a nineteen year old stoner that doesn't want to be there.
3) If it looks like it's rigged to explode... if you
think it looks like it might explode... if you had a funny dream about it exploding; STAY THE FUCK AWAY FROM IT.
4) If Sarge says he's not making anyone go, and whoever wants to stay behind can, turn on your heel and blow out of there.
5) Yeah, yeah, body armor is heavy and inconvinient. Wear it anyway. You know what else is heavy and inconvenient? Your carcass.
Oh, and if you find yourself the star of a documentary based on the war, don't mention your wife, kids or hopes for the future. And don't take off your helmet and stand up. Those are two surefire ways to get shot.
Good luck, be careful and stay safe.