That is a great thing to make sure you have in your business plan, that your business will be built around those real customer wants. Do not make callous assumptions, or statements like "I know what people want", "People are going to love this", and so on. Have you done your research? Do you really know that the people you will be targeting want your product / service, and crucially do they want it AT THE PRICE that you will be offering it at? Whilst confidence in your plan is fantastic, you must make sure that it does not lead you down a blind alley along a path that is not desired by your target market. Don't assume what customers want, do your research and make sure that is clear from the start in your business plan.
If you're one of the many people thinking about starting a small business, having a business plan is one of the first things you should have on your list of things to do. It doesn't matter if you're starting a small business from home or away, having a plan for your business is considered a blue print for a successful small business. What is a business plan and why do you need one?