With the economic downturn and a steady downward trend in family sizes, the end of the McMansion could be at hand. Some people are living in and building tiny houses (previously) to decrease their impact on the environment, while others can't afford more (or wish to own something small instead of paying off something big). Sergio Santos saw his small budget and limited space as a challenge (gallery), maximizing his 77 square foot space as a bedroom, office, and mini-kitchen. Claire Wolf lists the four pieces of living small: building, gadgeting, decorating, and coping. If these spaces are too small for you, Dan Maginn suggest 900 square feet for a 2 bed, 2 bath house, and outlines how to design your own small home (his tips: think "events" more than "rooms," and don't forget the cupboards and water heater closet).