Whether you are developing a disruptively innovative product or a uniquely repurposed solution, and no matter how clear your idea and vision seem on paper, designing as simple as a paper prototype is ...

If you're building a product for your new business, you'll first need a solid prototype. This will help you better visualize your concept and start getting necessary feedback from customers or peers.

Opinions expressed by Entrepreneur contributors are their own. Amazon Fire Phone, Google Glass, New Coke and Nintendo’s Virtual Boy: What do all these products have in common? They didn’t sell.