Why wait for your guy to treat you? A bouquet can put you in a good mood -- and even give you an all-day energy boost -- regardless of where it comes from, according to Harvard psychologist Nancy Etcoff, PhD. When we see flowers, our brains may instantly conjure festive memories. Put a vase of gerbera daisies on your kitchen table to start your morning right.

So what's stopping you? Go buy yourself some gorgeous flowers!