Need help with milk supply

What are some natural ways to increase milk supply? Without having to go out and buy the vitamins or teas, would rather try to eat foods that could help.. But any ideas are welcome,as I am not ready to stop Breastfeeding just yet.. My little girl is only a month old, and trying to stick with mainly boob. But seems I have to supplement formula due to her still acting hungry,please help! ***A picture of little Miss Rosalinda

Edit**I'm still producing in my left breast,but my right is producing less. Like only a half an ounce to an ounce, mind you I used my right a lot more then the left due to the left being really sore, and chapped.