Ok, so you've decided that you're going to give it a go.
Next thing on your list is to get the absolute basics together before you hit the trail.
You should have the following, at the very least:
Recovery strap & later a tree strap
Recovery points on your Jeep shackles or good strong hooks front & rear
First aid kit
Tool kit good assortment of wrenches & sockets both metric & standard, assorted pliers, duct tape, big zip ties, wire cutters, screwdrivers, etc. You might need the ONE thing you didn't bring if something comes apart or breaks.
Tire pressure gauge
Bungees or straps - Something to securely tie all of your gear down in the back.
Food & water, trail snacks lots of water.
Fire cigarette lighters or some waterproof matches
Insect repellent, sunscreen, blanket if it's cold weather season.
Trash bag! If you pack it in, pack it out! Tread lightly. Leave nothing behind but tire tracks. Even further along those lines, if you see something laying out there, pick it up and haul it in to the trash can.
I know I'm forgetting something, but someone else will surely chime in for me.