Use a "syringe applicator" and twist on a colored "tip".  Choose colored tip by size of stone andthickness of glue.  Green tip is the largest and orange, purple, white and pink are smaller in that order. For thicker glues use larger tips and for thin glues use smaller tips. To fill syringe applicator with glue just remove plunger and squeese glue to about 1/2 full or less then press down on plunger to push glue to bottom of syringe to avoid bubbles. Make sure your crystals have been set up with stones facing up by using a "wax stick" instead of tweezers which are harder to maneuver. Squeeze dots of glue onto thesurface; it's a good idea to practice on paper first. You can apply 3-4 dots or more when proficient. The wax stick will easily pick up each crystal and place it on dot of glue for quick work. Make sure dots are large enough to glue near edges of stones not just the center. Syringe applicators and tips are cheap and disposable. Professionals recommend this method of gluing because it is fast, easy and neat. It works!