Live like a college student long after graduation. My husband and I continued living in a small apartment with our old futon as a sofa for five years after graduation. At first, we didn't use cable and stuck with an old tube television. For awhile, we even figured out a way to make room for our baby in that small space.

Become a frugal chef. I didn't know much about cooking before I got married, but I quickly learned how to make vegetable-focused meals from the Food Network. Using small amounts of meat saved us money, as did limiting our restaurant meals.

Stick with one car. We've always chosen to live near public transportation so we can limit ourselves to one car, which saves us thousands of dollars a year. Between gas, upkeep, and insurance, cars are expensive, so sticking to one can make a big difference. (These first three items--housing, food, and transportation--take up about two-thirds of most people's incomes, so focusing on that pricey trifecta can have a big impact.)