I second the use of Imperial Sizing Wax. I've previously tried Hornady One Shot, Lee Lube (from the tube), and RCBS lube with a lube pad.
I pick up a case with my left hand and lightly touch my right index and middle finger to the Imperial Wax. I then pull the case through my right fingers with a twisting motion. As I prepare to place the case in the shellholder for sizing, I wipe my right finger across the case neck, depositing just the smallest residue to aid the neck resizer to slide out easily. I've lubed over 1000 cases since switching and have made only a small dent in the wax--looks like it will last for some time!
Hope this helps!
BuffDriver