Will you offer physical products, a service, or a mix of both? Once you understand your offerings, begin understanding your target customer.
Even if you expect to be a one-person show, getting an EIN is good for business and security reasons.
If you don't want to use your personal name for your home business, you might need to register a trade name. Check state laws on the requirements in your specific location since regulations can vary from state to state.
Your city or county will require you to purchase a license to start a small business at home.
Think of your business plan as a roadmap that outlines the necessary steps to achieve your goals and help you stay on track.