First, thank you Rob Wittig for giving me this great link. Everyone should take a look at this firm called Moving Brands. Not only do they do awesome work, but they show you their whole process of how they get to their brilliant solutions. If you look at their work, most of the pages will show you the extensive process in photos. Sometimes, there’s even video!
Second thing you should look at is Kern and Burn’s website, particularly there One Hundred Days of Design Entrepreneurship.