He who gives himself airs of importance exhibits the credentials of impotence.

Insisting on your importance is the clearest sign that it is not obvious. Real weight in a room does not need announcing; it shows in what happens when the person speaks, not in how they arrange the introduction. When someone reaches for the title, the story about who they know, the reminder of their position, they are supplying evidence in the wrong direction.

Notice the moment you feel the urge to establish yourself in a conversation. Let it pass unacted on, say the useful thing instead, and let people work out the rest from what you contribute.