Built on your expertise, whatever it is, and own your practice. You're a construction worker and a Jack of all trades ? don't just work for contractors...Buy an old house, renovate it and sell it... You're a health professional, like me ? don't just work for the government, have your private practice, write essays, train younger professionals... never let other people make money with your expertise, as much as possible. Be your own boss, be creative, innovate and never stop to learn about new techniques and practices, whatever your line of work
You also have the option of selling dope, but that's risky. Or you may open your own escort agency...:lol: