I was an ep-er for a bit of time and I had a few tricks I used that seemed successful. For a myriad of reasons (that don't need to be listed here) I never successfully put my baby to breast yet managed to feed him breast milk for quite some time.
First of all, when you pump try to pump about 5 minutes longer than when the milk stops coming out. You probably know that breastmilk production is a 'supply and demand' issue. If you 'tell' your body it needs more, then the body will make more - hence the longer pumping periods.
Next, make sure you stay hydrated. The amount of water you drink does not equal the amount of milk you will make, but remember that the creation of milk (plus pretty much everything else going on in your body) is a chemical reaction that requires water. So stay hydrated in order for ALL of your bodily processes to function their best. I would drink a 24+ ounce glass of water every time I pumped.
Third, I don't know if this honestly made a difference but in my mind it did - hah! I ate a TON of oatmeal, at least one bowl every day. If the oatmeal is just a myth, well, at least you're eating something healthy that has good carbs, whole grains, and protein - a healthy food to consume anyway.
Finally, I used both pumping receptacles with a cheap nursing bra I got from Target. I would open up the flaps and set the 'shields' inside the bra openings. You can also find a hands-free pumping bra but honestly I was too cheap to get one!
Good luck to you - I felt 'part cow' with the amount of milk I was producing. I pumped 8 times a day for 15-20 minute sessions and made at least 6 ounces per session (mornings were always the most...I did not wake up and pump because, seriously, mama needed her sleep!, and evenings were always lighter).