How can I increase the amount of breast milk I am able to pump?

Relax, drink liquids. Looking at a picture of your baby and imagine her nursing will help. Also, trying to relax and avoid multitasking will help. It is really important to drink plenty of liquids and pump as often as your baby would eat to keep your supply up. If you've tried all this, then mother's milk or fenugreek tea can also help. Good luck!