Enjoy nighttime nursing
Breastfed babies who are away from their mothers during the day often nurse more frequently at night. After mother returns to work, some babies reverse their daily patterns by sleeping more and feeding less during the day and then clustering their feedings during the night.
Faced with the demands of a job and a baby, you may find you can accomplish little else beyond doing your job and taking care of your little one. This is a completely realistic expectation. The one thing you should not neglect is taking care of yourself. Fortunately, breastfeeding can help you do this
When you get home from work, head for the bedroom and nurse while you rest lying down. If you and baby can take a short nap, the whole family will have a more pleasant evening. Have a quick and nutritious snack, so that there's no pressure to start dinner right away, and enjoy being with your baby. If you have an older child, include her in this reunion.
From Ask.DrSears.com > 20 Tips for Working and Breastfeeding