X2 on the smittybilt strap. When I got mine, I was all pissed off. So I tried to kill it. IT IS TOO TOUGH. Cheap, multipurpose, and durable. Also the price is right.
So that, 3 shackles (because you always misplace one) and go from there. Beyond that, I carry a small folding shovel. More for use around camp than anything else. I've started carrying four 8"x8"x12" blocks of wood. Easy to use if you get high centered on your diff, or need to build a temp ramp up a ledge or something. Cheap and handy around the garage the rest of the time. Oh and bottle jack YOU NEED A BOTTLE JACK. Works so well.
Beyond that, I really like my SEO 30ft kinetic strap and soft shackles. Work very well and handy. But that is the equipment I mainly use.