You can try affiliate sales...basically set up a website around a theme (perhaps a form of martial arts) and promote products there. However, this is a very competitive industry. Like others have said, you'll work hard if you work for yourself. Whatever you do, when you start making a decent monthly revenue, ensure you have proper asset protection measures in place because lawsuits happen when you least expect it. A good attorney and accountant are worth the 1-2hr fee required to structure your business properly.