On delivery of your kit, open it and inspect it. There is a parts list to help speed the process.

This is what the kit looks like except for the flat rectangular bumper brackets. The Ranger kit gets brackets shaped like a "U" with studs on it.

What you'll need:
-The kit!
-Shift extension #3700 if you have a manual.
-3x3" or 4x4" blocks at least 12" long depending on the jack used
-Jack
-Jack stands
-A good 1/4, 3/8 and 1/2 inch socket set w/ breaker bar and extensions. You could pass on the 1/2 inch set, it's just beafier.
-13/16" deep and standard sockets(for bumper bolts and kit bolts)
-Sawsall
-Razor knife
-Propane torch
-Vice grips(large)
-Sheet metal cutters
-Bottle of ThreadLock(small tub is included w/kit)
-Drill(3/8's or 1/2")
-Sharp drill bits 3/16 to 1/2"
-Mechanic's gloves(believe me, it makes the install so much more comfortable)
-Tape measure
-Patience
-Patience

OPTIONAL:
-Beer of your choice
-Heater
-Welder
-Air Impact tools

Read the intructions thoroughly before you start! This helps you anticipate problems for future steps.