My favorite web site for breastfeeding information is
KellyMom. There is also a forum there to ask questions. They can help you tweak your pumping to optimize your output and efficiency.
A few things that come to mind that speed things up for me:
1. I keep my breast shields in the refrigerator (or cooler bag) after each pumping session. There is no need to wash them in between pumping sessions. The milk on them is still good per storing recommendations. I put them in a ziploc bag.
2. I do not sterilize. Unless your infant is premature or there are other concerns, there is no need to sterilize. Once your infant begins putting things in his or her mouth (toys, hands, dirt), it's not really doing anything anyways.
3. I pump while driving. I use a hands free bustier (Simple Wishes). I get everything set up and the pump turned on before starting to drive. When I'm done pumping, I turn the machine off and wait until parked to undo everything. I get one or two extra sessions in a day with pumping in the car.
These are the biggest time savers for me. It is better to pump more frequently to maintain and increase your supply rather than longer less frequent pumping sessions.