Quoting Alkyl:" My little girl is 5 1/2 months and has been exclusively breastfed since birth. I used the electric ... [snip!] ... any advice for successful pumping? I've tried relaxing and looking at a picture of my lg but nothing stimulates the let down."
Are you pumping after she nurses and getting 1 oz out?
If so, thats normal. Make sure you nurse her and then pump. At first you wont get much out, but thats because she ate..But it will tell your body to produce more milk and soon that amount will increase.
If that doesnt work, try a larger (or maybe) smaller breast shield to fit you better.