If you suspect that you are having milk supply issues, try eating some of the following foods:

• Oatmeal - either a bowl for breakfast or an oatmeal cookie as a snack
• Dark, leafy green vegetables
• Wheat grass (usually taken as a shot)
• Herbs that are available in capsules or some teas: fenugreek, blessed thistle, fennel, anise, hops, and alfalfa

Before you try treating yourself with herbs, though, talk to a lactation consultant and take other appropriate measures to correct the problem.  For example, make sure Baby is nursing often enough and has a good latch, and that you are eating and drinking enough.