Unfortunately, I've never been one of those women who have an abundant supply of milk :( Usually in the first 3 months I have tons of milk, but for some reason my supply starts to drop after 3-4 months. I really don't know why! So after nursing 2 babies (currently still nursing the 2nd at 1 year) I've found many ways to boost my milk supply.
First off, if you are just starting out with a newborn it is so important to see a lactation consultant and make sure baby has a good latch, is not tongue tie etc.
Also, nurse nurse nurse as much as you can to build your supply in the beginning. Do not feed formula while you wait for your milk to come in. Colostrum has everything your baby needs so there is no need to supplement while you wait for your milk. Sleeping with your baby, holding your baby, wearing your baby, looking at your baby... these are all natural ways to boost your supply.
Check out http://www.kellymom.com/ & http://www.drjacknewman.com/ for great information about breastfeeding.
Here are some ways to boost your supply: They WORK!
-hydrate, hydrate hydrate--- water.. TONS of it. Also many women swear by drinking gatorade
-eat a balanced diet with plenty of protein (65-100gms per day)
-rest & nap with baby
-oatmeal
-I've "heard" steak boosts supply, but I never noticed that.
-brewer's yeast - powder or capsules. I prefer the capsules bc the powder tastes like POO!
-lactation cookies (oatmeal cookies- yum!) http://www.momaroo.com/723074952/lactation-cookies-for-nursing-moms/
-HERBS- fenugreek 3-4 pills taken 3x daily-- You will know if you are taking enough when you smell like maple syrup, blessed thistle - 2-3 pills taken 3x daily (works great if taken along with fenugreek), alfafa, red clover, & marshmallow root
-Mother's Milk Tea, More Milk Tea, Red Raspberry Tea
-pump or nurse more. If baby will not nurse (like my active 6month wouldn't) then add some extra pumping and/or pump immediately after nursing.
-Power pumping- hook-up as you would for a normal pumping session, pump for 10-20 minutes, rest 10 minutes, then pump another 10 minutes, then rest for 10 minutes, then pump again for 10 minutes. The mother does this for about an hour, once per day, to increase supply.
-Domperidone-- by prescription as last resort. I never went this route. Just wasn't into the "drug" thing, but I hear it works!
I may be forgetting some, but using some or all of these methods will CERTAINLY boost your supply.
Happy nursing!