I strictly pump. I'm returning to work a week from today (6 weeks PP-which is going to be so hard). I pump every 2-3 hours for 10-15 minutes. At night, I will go 4-6 hours. I have a freezer stash started (I'd say about 1 week of feedings) and 4-5 bottles in the fridge ready to go for feedings. If you feel like you need to produce more, then I would pump more in between feedings, especially if your returning to work. You can also nurse in the mornings and evenings and I heard that increases your supply.
Re: BF/Pumping?