LOL good info here.
ARB or Bubba Rope if you have the cash. Otherwise, pretty much any decent strap will work well. Just make sure you understand the different uses for stretchy (what you want) vs. non-stretchy (usually only for towing). I don't remember the length of the first one I bought but it was too long, so don't go too crazy.
Get at least two shackles/clevis/d-rings. 3/4 is probably good enough, you can usually find them cheapest at a farm-type store, but even amazon ships em too.
As someone posted above, sometimes the "kits" are good deals, especially this time of year as they clear out last year's models. Double that if you ever think you might take that 2wd off-road for some fun wheeling in the mountains.
Other easy stuff I didn't see mentioned - a container of kitty litter will go a long ways, or since you have a lot of room in that bed, you could toss some traction plates or whatever they're called in there - there are a ton of different kinds, but the idea is that you just stick em' under your tire and drive right out. Something like this:
http://www.amazon.com/dp/B001LF6WNW/ but I assume
there's something cheaper out there too that would work just as well.