Maintenance 101 videos I made (hope they help make these jobs seem less daunting if you have never done any of this before!):

All of this was done on a 2006 WK, 4.7L, 4x4

How to change your Engine Oil:
http://www.youtube.com/watch?v=xYIVD5a-1Ak

How to change your Serpentine Belt:
http://www.youtube.com/watch?v=c_XWv9uCRYc

How to change your differential fluid (front and rear):
http://www.youtube.com/watch?v=rNdHmpQQJJQ

How to change your Spark Plugs (two part video):
Part 1: http://www.youtube.com/watch?v=qqP87FFsffA
Part 2: http://www.youtube.com/watch?v=1eh3GDaHAyM

How to change your Transfer Case Fluid:
http://www.youtube.com/watch?v=_AwW-MMujZI

How to change your Transmission Fluid & Filters:
Part 1: http://www.youtube.com/watch?v=81tt6-CC0VE
Part 2: http://www.youtube.com/watch?v=hVCFvvPGkNc
Part 3: http://www.youtube.com/watch?v=1wcKFSeslj8

Let me know if you want me to do any other videos and I'll record it next time I am under the hood.

Jack