When I am performing an AP-on-a-stick survey, I use a paint pole in order to mount a temporary AP. It is light and convenient. Here is the one I use: Mr. Long Arm 3212 Pro-Pole Extension Pole, 6 to 12 feet.
So I use the same pole to label ceilings for future AP's location. Here is how I do it in 8 steps:
1 - Print out your label (I use a portable P-Touch)
2 - Peal out the back of the sticker
3 - Lightly stick one edge of the label to the top of the pole
4 - Lightly stick the other edge on the other side of the top of the pole
5 - Choose the location on ceiling
6 - Stick the label at the desired location
7 - Apply pressure in the center of the label
8 - Apply pressure on the sides finishing sticking the label
Hopefully, this will be helpful for you as well.
written by François Vergès