X2 on AlexW's comment. Also, It seems obvious but keep your freaking limbs inside your vehicle. I've seen some close calls recently.
My first time wheeling in Moab, I learned a lot in the first 2 minutes.
First, slickrock is not slick. You don't floor it to make it up a climb. You want to crawl.
Second, when the Jeep begins to slip sideways on said climb, you can not stop it from rolling by sticking your arm and leg out of the jeep (luckily, I broke the jeep before I rolled).
Third, it is a real good idea to ride with someone your first time out and see how they do it.
Fourth, changing out broken hubs and bolts in the Super 8 parking lot is not too difficult.
Some other advice:
Lean your right foot against the transmission tunnel. When the jeep begins to bounce, your foot is against something stationary and not bouncing on the gas pedal.
Follow right behind someone who is a good driver that is not too crazy. Take their line.
If there are multiple obstacles, look ahead at the next couple of obstacles, not the one you are on or about to do. You want to be set up before you get to them.