R.Y.
I struggled a lot with milk supply (pumping exclusively, baby in NICU). If your baby is only a few weeks old you will probably have an easier time than later. But here is the info I got from the nursing specialist (an MD). Foods that help: extra protein, almonds,oatmeal, barley, sesame seeds. Herbs: Fenugreek (up to 9 capsules per day), Blessed Thistle (up to 3 capsules, 4X a day). Medication by prescription: Domperidone (I used this and it helped a lot). You can also see about a nursing supplementer. Using the supplementer the baby can "nurse" and get formula through a tube taped to your breast. That was one thing I didn't try that might have helped. If you are pumping only then many short session are better than fewer longer ones.
One more "fun" thing is making lactation cookies. You can google and get a recipe but basically chocolate chip oatmeal cookies with extra flax seed and brewers yeast added.