Advice Please!!

I go back to work at the end of August (approximately 6 weeks from now), so I'll need to begin pumping to begin a daycare stash.

I've never breastfed past 6 weeks for various reasons, but with a job that supports pumping this time around my goal is 1 year.

1. When should I begin pumping?

2. How do I work it into Baby's daily routine? My tentative plan was to pump at work but direct breast at night.

3. About how many ounces per bag/day should I shoot for, using the argument that I'll be away from Baby for about 9 or 10 hours?

Any advice from mom's that have done this is super appreciated!