Green Thumb: Plants help keep office air clean (or remind you of cleaner air), plus, the colors of your favorite flowers can help spark creative juices.
It's all in the light: Overhead lighting create glare (it's also unflattering, which is bad for your self esteem!), so use desk lighting, or rely on natural sunlight whenever possible.
Skip "free" foods: Let's face it, nothing's free- that includes unhealthy meeting snacks or the bowl of M&Ms on the receptionist's desk. Instead, follow bring your own guilt free snacks, like nuts or berries.