3M Headlight Restoration KIt

It's finally gotten to the point where my driver's side headlight needs a good polish. It's yellowing and looking terrible in comparison to my freshly replaced passenger side light (yay warranty!)

I picked up this 3M Headlight Restoration Kit - I've heard great things about it, and hopefully I can find some time this weekend to do it up :)

3M 39008 Headlight Lens Restoration System

I've been told to follow the directions explicitly to get the best results.  Does anyone have any tips or tricks?