Forget testing. Forget marketability. Forget strategy. I hear fear, followed by more fear. How can I protect my invention? Will a patent stop my idea from being stolen? Instead of getting emotional, focus on outthinking the competition. If someone wanted to work around you, how would they? In other words, try stealing your invention from yourself.
You don't have to drain your savings account or quit your day job to get a concept off the ground. You don't need co-founders, investors, or even to write a business plan. From the advent of rapid prototyping and crowdfunding to the widespread affordability of digital tools and technologies, the opportunities available to creative people today are fundamentally different -- and enormously exciting.