I tend to not pump after feeds anymore. It wasn't really getting me anywhere, and it was killing my nipples. I have a different system for making a stash.
I know I'm weird, but now that Norah is typically starting out the night with a 5-7 hour stretch of sleep, I will wake up in the middle of that and pump in the wee hours. I get SO MUCH milk at that point, and if she sleeps that long, I don't even have to set an alarm - my engorged boobs wake me up. :/ But it's for the best, since I can usually get like 5-6 ounces total at that pumping, and that makes enough for her early morning bottle (I usually let my husband feed her on his days off in the early morning so I can keep sleeping for a bit) and also some so if we go out, I can give a bottle. That middle of the night pump is way more effective than pumping after her feeds for me - but honestly, I do it mostly because of the engorgement. My breasts started out so small before and even during pregnancy that they're having trouble keeping up with quantity - I don't have a ton of breast tissue, so they fill up about every 2 hours. If I go more than 3 without nursing, I have to pump or I'm in severe pain.
I have no freezer stash, but I keep a rotating fridge stash of about 8-10 ounces - it's good for a week in the fridge.
I was reading somewhere that often times, part of the reason babies vary so much in the amount of breastmilk that they eat is because the milk ratio of foremilk vs hindmilk varies from woman to woman. For example, a woman who makes less milk at a time will compensate for quantity by producing hindmilk quicker, making her milk content fattier and more filling per ounce. Isn't that interesting?
My letdown has changed this week - now, if I'm engorged at all, even a little, I squirt my poor kid in the face if she lets go during letdown. :( She really hates it, but she's getting used to it - I found that nursing her while reclining helps.