Wait until the male plant has signs of pollen on the leaves and stems. It will be a yellowish color. I use a tea cup held under the areas where I see the male parts of the plant and take the same brush that I will use to pollenate the female and give the pollen site a little tap with the handle end of the brush. The loose pollen will fall into the cup. Repeat for all the sites. If the male is ready, you will have plenty of pollen collected into the cup to seed a bunch of females. Cover the cup until you are ready for the female, hopefully within a couple of days.
Mark the bud site(s) that you want to seed on the selected female, dip your brush into the pollen and sprinkle the pollen onto the bud you want to seed. Cover that bud site with a zip lock bag for a couple of hours. Spritz the remainder of the plant with Ph'h water. When the plant is dry remove the plastic bags.
This should be done a least 4 or 5 weeks before you plan on harvest to give the seeds time to fully mature. At harvest I remove the marked bud sites and dry in seprate areas. Most of the time I get 50 or more seeds per bud site doing it this way with very few if any seeds anywhere else on the plant.
I've frozen the pollen in a plastic medical bottle for a year and used it after it thawed out, and had luck pollinating with it. I'm pretty sure you could go longer but I have never tried it before.