Just did mine a few days ago,
thanks to this thread it went flawless.
Followed all the advice here.
Soaked all plugs with PB Blaster for 2 days, did the changes the 3rd day, no problems.
A few probably too obvious notes:
Since I dropped the spare to do the rear diff (as recommended here and excellent advice), it gave me a chance to inspect, clean, and check the pressure on the spare as I just bought this 2 months ago. 7lbs!
Probably never touched since the car was new (2003).
So a great opportunity to kill 2 birds and put air in the spare.
Also, I don't do anything underneath without a cardboard box opened up to catch any spillage and to lie on.
I actually didn't lose anything on the driveway from the diffs or transfer, but did when I removed the stinkin' oil filter!
I didn't need to use any jackstands, was able to access everything with the car flat on the ground.
Rear diff was dirty and disgusting, transfer and front diff not too terribly bad.