Here are a few additions:

1. This one is not a howto, but is a good reference nevertheless: maintenance schedule

2. VQ35: replace Idler pulley and drive belts
3. Rear control arms and death sway
4. Pathfinder SE roof rack installation
5. Servicing the front wheel bearings
6. Adding an aux input to stereo
7. Steering knuckle replacement
8. Cleaning the sunroof water drains (you should do this regularly)
9. Replace the fuel pressure regulator and/or fuel damper
10. 2002 Qx4 steering wheel swap
11. VQ35. Labelled picture of components hidden under the intake plenum
12. Idle Air Relearn Procedure after P0505 and idling issues. Using a smartphone app
13. Primary oxygen sensors for 3.3 engine


It seems our newer platforms don't have too many issues being reported here, but these should help some:
R51 (2005-2012) radio settings being lost
finally-a-real-fix-for-the-radio-and-cl ... 19896.html

R52 (2013 - present) radio settings being lost
fix-for-new-settings-being-lost-t619870.html