Breast Pump Question

One of the newest members of our Young Mother's Club needs advice on using a breast pump. Any advice/tricks on how to express more milk. She is only getting about an ounce at a time.  I know I had this same problem when I first started trying to pump. So let's hear it girls.... 

Also, do you have a brand of pump that you like better? Electric or hand? Evenflo or Medela or Avent....?