I would recommend Hi-Lift's off-road kit (
Hi-Lift Accessories). It's pretty darn complete. I have the off-road base. If you get that, drill two holes and add a loop of rope through it. It's easier to get it out of the muck if you bury it.
Additional items (see link above):
Handle keeper to keep the handle from banging all over the place.
Mounting brackets. Either the 'tube mount' or 4xRAC. Depends upon how you mount it. Mines in my bed over the passenger side wheel well (pic in my album).
Lift-mate and/or bumper lift.
Useage:
Kick the base in towards the vehicle a little bit. As the jack raises the vehicle, it will straighten up.
Never wrap your thump around the main vertical bar as the handle could smack it.
Never get your face in the way of the handle. Same as above.
Chock and block your wheels before lifting.
Never work under your vehicle with just the Hi-lift supporting it.
I suppose there are hundreds of other 'never's'.
Do - use common sense.
Do - practice using it.
Do - use WD-40 to lube the working parts. Check monthly.
Don't use white lithium grease as it attacks dirt, sand, etc.
Do - respect the tool.
Be safe!