Rehearse what to say. When you're ready to try something you've been avoiding because of shyness — like a phone call or a conversation — write down what you want to say beforehand. Rehearse it out loud, maybe even in front of the mirror. Then just do it. Don't worry if it's not exactly like you practiced or if it's not perfect. Few of the things more confident-seeming people do are perfect either. Be proud that you gave it a go. Next time, it'll be even better because it will be easier.