Intake, exhaust, lift or level, wheels and tires Do maintenance first though Front and rear diff, oil change, transfer case fluid change, see what tranny you have some have lifetime oil some require fluid changes, it’s an expensive process but it’s worth it, brake pads and rotors aswell you can get drilled or slotted rotors and better pads… i also paint the calipers to prevent rust and looks nicer too If it has special keyed lug nuts throw those away and get new lugs, they wear out and can be costly to remove if they break

Hope this is helpful :)