Splurge on a nice small arrangement of fresh flowers. The colors and fragrans are calming. Just as smiling has been shown to change your mood, language can do the same. What you say and how you say it steers your state of mind. So when a friend asks, "How are you?" don't refer to your usual script ("OK, I guess" or "I've got so much to do today"). Instead, say how you want to feel as if you already do ("I'm fantastic!"). "You not only convince others, you'll convince yourself too.