What are you going to sell? Is it a product? A service? An app? What makes it unique? Why should the world want what you have to offer?
How much will you sell your product or service for? Is it more or less than the competition? Will your customers be able to afford it? Will you be able to make a profit?
How will you get the word out about your amazing idea?
Where will you sell your product, or where will your service be available? Are you meeting your customers where they live, or are you expecting them to find you? How will customers access your product or service? Will it be online? Will you set up in your backyard, or have a reseller?