If you enter a meeting with your enthusiasm low, ignore it.Shake hands confidently; reply definitively to questions; assert the value of your ideas and proposals.
To her it meant moving confidently around the court room, using convincing body language and projecting her voice so it could be heard from the judge's bench to the back door.
And singing is just like my knowing smile. I like the feeling of confidence which comes with effort, it makes me never disbelieve my own potency even when I am down.
Authoritative parents are more likely than permissive parents to have children who as adolescents are self-confident, high in self-esteem, and responsibly independent.
If you want your kids to have strong self-esteem and the confidence that they can solve hard problems, those qualities won't magically materialize in high school.