Breast: Similac

Need Suggestions to Produce More Breast Milk

I am a first time mother to my 2 week old son. We are trying to breastfeed, but it seems as though I am not producing enough milk. I have been using Similac Organic Formula, pumping, and taking Mother's Milk tea, but I would like to know if anyone knows of anything else that might help me produce more milk and also if there is a better substitute for the formula.