You have to find your own style, and it's difficult to define what style is. It's not what you're wearing; it's how you wear it. It's something very personal, and it reflects the way you live and your house, the books you read, the art you have.
You have to have curiosity in life. The moment you don't have any more curiosity, then don't do anything. Retire and stay in your house.
You have to have a full-length mirror in your house so you can see what is missing and what you have to add to your look.