(Inc) — Is your great idea good enough? Can it grow in this slow economy? Can it become profitable, and return on any investments it requires? Well, there’s no way to know until you try, right? Hardly. There are some ways to prepare yourself, test your idea, and improve it before you actually found a company around it. We’ve compiled the best examples from recent Inc. articles and Inc.com guides of tips for the very early steps of building a start-up.