I pumped first thing in the am - I had a whole lot after the night, so I pumped one side in the am, and fed her from the other side. Then I would pump in the evening while dh was giving her the df - I could usually get enough in 2 pumping sessions. However, as she got older, she took more at the df, and I had to pump 3-4x a day to get enough - I would usually pump 30 min or so after a feed or during her naps - I really couldn't pump reliably when she was around. What kind of pump do you have? I had a manual pump, and then switch to the Medela electric, and I had much better success with that.
hth
michelle