The basic premise of the long tail is that there is an equal or perhaps larger market of those willing to buy unpopular items (or services) than all the people who buy the popular items. It goes against traditional wisdom of focusing on items that can be sold many times, as you may be missing an even larger opportunity in the long tail. Instead, the long tail theory is to sell a few things to a few people at a time, but repeat this many times over. Of course the kicker is that it only works i...