Everyone has ideas. Most people don't take any action on their ideas. But if you are serious about starting your own business, the first step takes just 5 minutes. And no, it's not to incorporate, or patent, or even find a cofounder. The first step is cheaper, easier, will make a bigger business impact, and something you can do at your computer right now. The first step is to prove people will pay for your solution before you even start! Here are the 4 steps to test any business idea online.