True low supply is very uncommon as most women are capable of producing a full milk supply for their infant and is in fact a perceived low supply due to lack of knowledge around normal lactation and normal infant behaviour. Working with a lactation consultant will help correct any underlying issues that may be causing a lack of supply.

By far, the most important way to establish and maintain an adequate milk supply is for breastmilk to be removed often and well.  Breastmilk is made of a supply and demand basis- the more milk removed from your breasts (and the more often), the more milk they'll make and vice versa. Adequate maternal nutrition, fluid intake, rest and reduction of stress all assist in ensuring a good milk supply.