One of the most daunting things you can do as an entrepreneur is stare at a blank piece of paper. It's also, however, the ...

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.

Visualizing and prototyping are critical first steps in transforming a concept into a viable product. Simple tools and creative brainstorming can streamline the prototyping process, saving time and ...