A lot. Style. Health. Discipline.
The key to reinventing yourself is first and foremost getting an idea of what you want to do. When it comes to health, what do you want to look like? When it comes to sports, what are you trying to accomplish? If you have no idea what you want, there is no such thing as reinventing yourself. You're simply swimming in the dark.
So once a man has discovered an idea of what he wants, he has to formulate a gameplan of how to get there. If you want to lose weight, look up different things about diet and exercise. if you want to get better with your finances, buy different books on finance and read them. This second step is accumulating the necessary knowledge to accomplish your goal and to make a plan.
The final step is to actually DO it. Put the plan in motion. When it comes down to it, there's nothing magical or no hidden, secret knowledge. People who aren't afraid to get up and put in the work end up getting their results. If you want something, you simply have to get up and go after it. Persistence and learning to bounce back from failure is the key. If one way doesn't work, try another way, and then try another way, and keep on going until it works.
Accomplishing things in life is simple, but it's not easy. Anyone who wants to reinvent themselves HAS to be willing to get up off the couch and get to work.