What is your product? What is your market? How do you plan to reach your market? What makes your product different from other products like it (in the same category)? Hope that gets you started.
you have to begin with your product. What does it do? What is it's appeal to the world? Get inside to a bigger passion for your product, especially if you have used it. Start with that and it will open your mind up to other ideas.....good luck