Make sure you have tow points for someone to pull you out when you get stuck. A reese hitch works well in the rear for this & it would be nice if you also had some for up front.
The more agressive tires you get for wheeling the better, street tires do not do well in the woods, at least try to get some ATs or something. MTs are best, but may not work well for a daily driver. Find out what type of lift you want to start with, a 3" lift wouldn't be too expensive & would allow larger tires and better performance offroad.
Get a recovery strap of your own also, walmart sells them for pretty cheap. Be prepared for something to possibly break, as it does happen to everyone.
Wheel somewhere legal, Haspin is close & cheap. Never wheel alone, check out this board &
www.terrainstompers.com for people going wheeling, there's usually a group going every week or so somewhere.
A small toolkit, first aid kit, fire extinguisher, lug wrench & jack are some basic items I would recommend bringing wheeling. I know there's a bunch more but those are the basics.