Become successful enough that success no longer needs to be mentioned.

Talking about your success is usually a way of collecting the confirmation you cannot yet supply yourself. When the thing is genuinely solid, the need thins out, because you are no longer checking whether it counted. That is why the people furthest along often say least, and why the urge to mention it is a fair gauge of how settled you actually are.

Notice the next time you find a way to work an accomplishment into a conversation. There is no shame in it, but ask what you were hoping to receive. Then try letting one such moment pass unmentioned and see what the silence feels like.