help with increasing breast milk supply

Ciara
Okay..  Im a mother of two but a first time breastfeeding mother.. My newborn son is taking formula and breast milk.. But my supply/flow is low/slow and I jus don't want to give up on breastfeeding/pumping && give him jus formula.. And it's very stressful that my supply is low && I jus want to breakdown.. 
What can I do to increase my supply/flow???