Increase breastmilk stash?

I am 3 weeks post partum and exclusively feed my baby breastmilk by pumping...I am currently 4 feedings ahead of my baby, but I want to build my production/stash...what are some things you do to produce more milk and build your stash? How can I get my boobs to produce more.

I currently pump every 2 to 3 hours...except at night my latest pump is normally around 1am and could go as long as 6 or 7 until I pump again (mainly cause that's the only time I can sleep). I know that I could wake up and pump between those times, but honestly I just can't make myself do it!

If anyone has ways to produce more milk and build stash as well as get some sleep please let me know!