I am all about more and better revenues. It's clear that many clients are confident about themselves - the way they carry themself - their attitude, and their actions. But many people who are confident about themselves are not confident about the products or services that they are selling - and this causes them to not be congruent. People can hear and feel your lack of belief in your product or service.
Video for more suggestions - and then review your actions in a mirror - yes, a mirror. Are you walking your talk?