Flowers really do brighten your day, according to Harvard researchers. In the study, two groups of people lived with either fresh flowers or decorative item like a candle for about a week; their emotions were recorded several times a day. Those who kept flowers were kinder and more compassionate toward other, and felt less negative overall. What's more, they said the positive vibes even made it from home o work, where they felt happier, more enthusiastic, and more energized. So imagine what fresh flowers could do in your home to a prospective buyer.