See Post # 2.
If you already have those, then look at getting a winch. You don't need to buy a $1,000 bumper to mount a winch. There are a couple of manufacturers, including Warn, who sell a mount that works with the stock bumper.
A winch is the only tool that will get you out of a stuck. All the other mods will only serve to get you into deeper holes.
Then, get educated on how to use it. Winches can be very dangerous if used improperly. Take a class, buy a dvd, then go out and practice with it.