Start by getting a breast pump you like. If you're planning a return to work or school, start pumping during your planned "away" hours a few weeks before your new schedule begins. You get the hang of pumping, and your baby can adjust to drinking from a bottle. When away from your baby, pump at the time you'd be feeding them if together—your body should continue to make the right amount of milk for their needs. You can freeze and store any extra.