I have done the frozen pollen thing, and the stuff just wasted in the freezer! Good intentions though.
What I do better is see the expectations of a new creation while out in the garden working. Newest stuff is usually my pollen.
Here is an example of being over zealous. These plates get put in the fridge for a few days. Stacked.
Before I go out in the morning, I take a pp and label several of the latest and greatest. Go out and get the pollen fairly early and leave the plate inside for pollen to turn fluffy. Have even used the turned off oven after it warmed for 3 minutes, when desperate! The plates go in the freezer for a day or two as well.
Another trick is to take the flower of a today's daylily and put it in the fridge and use it the next day. I take buds and put them in in a glass of water to ripen on a new cultivar when I don't want to expend plant's energy to bring each flower to open. I hardly ever let a new plant bloom too much and only try to set on one flower.
Picture shows plates getting ready to be tossed. Just checking them over in case there is the 'must use today' pollen before out they go!