What are effective self-confidence techniques?

Here is an effective technique for building self-confidence discussed by Andrew Huberman and David Buss on the Huberman Lab:

• Self-Deception for Confidence: One proposed method of enhancing self-confidence involves a form of self-deception. The idea, introduced by evolutionary biologist Robert Trivers, suggests that effective deception often starts with self-deception. If individuals can convince themselves of a certain positive trait or value, such as being highly competent or valuable, they will more easily persuade others of the same. This form of self-belief can increase the perception of confidence, which in many social situations, leads others to assume the person genuinely possesses the qualities they are confident about 1.

This technique suggests that cultivating a genuine belief in one's abilities can not only boost self-confidence but also make it more convincing to others, thereby enhancing social and professional interactions.