Think a lot on what you want to be or what you want. Act like this person, think like this person. Make decisions like this person. Consider how they approach problems, and find solutions, and teach or help. What kind of advice would they give? If you’re not armed with that kind of advice, learn the subject.
See yourself as this person. Like the things they like and eat the food they do. Make their friends, your friends. Introduce yourself like this person.
Walk like this person. Have this person’s posture. Wear this person’s clothes.
You can’t wait for this to happen, you must take action. Every day, make a deliberate effort to shape yourself into the kind of person you want to be.