Pumping?

How do you suggest I pump to build a supply? My little girl is about to be 2 months (on December 29th) and I make sure she gets one bottle a day so her dad can have that bonding time. During that feeding I can get out enough for her to eat at the next feeding, but I want to have more than that but don't know how. I have the little wheels that I wear during the day that catches any leakage which I can then save, but that still only brings me up to usually about 3 feedings. I want to have a lot for her for when I eventually go back to work, but this is my first baby and I'm not sure when I should be pumping, or how to stimulate to build the supply up.