When you're about to start your own entertainment business, you shouldn't just dive right in. You'd only end up making mistakes and blowing a chance at something terrific. The best way to start an entertainment business (or any business for that matter) is to create a business plan. You can create a plan in a few steps and be able to build a strong foundation for a business with longevity.
Establish the basic outline of your business. For an entertainment company, for example, you would want to include the initial services you'd offer as part of your business model, such as party music, DJs and costumed characters.