There are so many but I thought of this one today and wanted to pass it on. If you plan on pumping/breastfeeding: While you are on maternity leave, pump as much as you can to get a good freezer stash going. There are some days when you just can't get away to pump 3x/day. Having a freezer stash makes those days less stressful because you know you have milk to give in your freezer.

What advice would you give to a first time mom who plans on going back to work?