First, I start with my batting on the table. It's easier to get to hold still for me. I clamp it down all around my table.
I spread the backing over it and make sure everything is as it should be. Then I fold back 1/2 and spray in a sort of grid like pattern. Smooth the backing over the batting and repeat on the other side.
Flip it all over and do the same with the quilt top.
This methods works really well, but I do generally end up with lots of fuzziness on my hands and forearms. I've gone to using Elmer's glue and a paint brush. It seems less messy to me . . . and cheaper. I'm cheap!