She is the Goddess of wealth, fortune, and prosperity. Lakshmi is the wife and active energy of Lord Vishnu. Pictures of her has her with four hands. They represent the four goals of human life. Most important to the Hindu way of life, dharma (virtuous, proper, moral life), kama (longing, desire, pleasure of the senses), artha (income security) and moksha (liberation, self-actualization).
Praying to Lakshmi will help you keep a balanced life of these four human goals. As with life, to become over active in any one of them can cause opposite results. Praying to Mother Lakshmi will help achieve these and keep them in balance.
Pray/Mantra: Om Hrim Shri Lakshmibhyo Namaha.