3. Consider ergonomics. "The furniture style follows the function," says Rigby. Once you've determined your room's function and the amount of space available, you can start figuring out what furniture will work best. While function and space are important, you don't want to forget about comfort either. Ask the same questions about your existing or future furniture that you're asking about the space itself. What can you do to improve your furniture's support or comfort level? "When you talk about ergonomics, just think about what actions you are going to do in your room or home," advises Hebson. "Try making those movements and observe what keeps you from being comfortable. One by one, eliminate all the disturbing factors that cause the inconvenience."This is particularly important in multipurpose and high-function spaces, such as offices and kitchens, where repetitive-motion injuries, strain and stress can happen easily. "Ergonomics in today's society is so critical, because it reflects a lifestyle that many people are trying to attain," says designer David Arduini of 3sixty Space Planning Design.