To save money on exfoliation, try using regular old white sugar while in the shower. It makes a great face and body scrub. To fix streaky self tanners, add a teaspoon of lemon juice.
To alleviate pain from plucking hairs, tweeze right after showering when your hair follicles are open. The hair will slide out more easily.
Foundation can also become concealer. When the amount you have out starts to thicken, use a concealer brush and layer it on to whatever needs to be covered. Makes a great color match too!