One situation that qualifies as an unforgettable moment is when you have the chance to introduce yourself to someone you admire. It may be a famous academic or lecturer, an actor, business person, or athlete. No matter the category of importance the person has been awarded, that person has been deemed worthy of respect by you and you would like to meet him.
Whether you see this person in public, or in a controlled situation such as an event, a lecture, or an intimate gathering, if meeting him or her is something that is important to you, etiquette can guide you.
There are specific guidelines for introducing yourself to someone, but remember, etiquette is situational and contextual. Meeting a VIP is a little out of the ordinary in that it's probably going to last only a moment.
Sometimes the protocol to observe is obvious, or may take some planning. You might need to reserve your place in a queue, or perhaps you are near the person whom you'd like to meet and others are gathered around. Take note of the situation and be respectful of boundaries.
Living fully starts with being willing to put yourself out there and initiate connections, however brief.
Introducing yourself involves saying your name, but it gives practice in connecting with others in a variety of situations. What is important is that you introduce yourself in ways that are appropriate to the situation, and make people remember you in that moment as someone worth meeting. A well-regarded person will also appreciate you reaching out to express something of personal importance about him or her.
If you have a strong desire and opportunity to meet someone you admire, I encourage you to do it! These opportunities seldom happen, and you never know what may come from them.