Take a look at the recent book Sprint: <a href="http:&#x2F;&#x2F;www.goodreads.com&#x2F;book&#x2F;show&#x2F;25814544-sprint?from_search=true&amp;search_version=service" rel="nofollow">http:&#x2F;&#x2F;www.goodreads.com&#x2F;book&#x2F;show&#x2F;25814544-sprint?from_sear...</a><p>It details a creative process for developing concepts and testing them. Given that the book outlines a 5-day process that is tailored for product development teams, you might get a lot out of it for personal projects.