Freshen the walls. If the walls in your home feel as if they're closing in, maybe it's time to find a new coat of paint.___38___Researchers at the University of British Columbia found that blue boosts creativity, while red increases attention to detail.

___39___In a small study，volunteers worked from noon to 8 p. m. in a room lit primarily by daylight or one lit primarily by artificial light. By the end of the second day, those who had worked in the sunlit room were less sleepy and performed better on performance tests connected with mental process.