Accessories you ask.... what do you plan on using your jeep for? Then people can toss some specific ideas your way.
Wether you take it offroad or not, get some grab handles for the front seats. They usually just wrap around the rollbar. I've got some tall friends and they all find it more useful than the handle on the dash, and if you've got a 2 door like me it might save some manhandling of people going into/out of the back. At least your passenger seatbelt is mounted to the seat, like the driver's side. In my '07 they're mounted to the floor, creating some ridiculous human deathtrap.
-Fire extinguisher, somewhere handy... you never know.
-First-Aid kit
-Flashlight
-Knife/multi-tool
-Booster cable
-Gloves