I only needed a little for my next run, so I chopped the male flowers off, put them in open jars, and in a container with a mini dehumidifier. Then later I dumped the jars into a pollen shaker I got from Amazon, and it sifted out the pollen pretty well
If you want a lot of pollen from it, I would suggest looking at @DougDawson thread here. He got A LOT.