Think of Amazon. They probably have a few best-selling products, but the majority of their retail revenue comes from a wide variety of things that aren't bought anywhere nearly as often as their best-selling products. Similarly, if we were to rank the popularity of the songs played in the last …

There are many software programs that automatically spam forums and blog with comments, and these programs normally build anchor-rich backlinks, which means a keyword phrase is used in the place of a real name. In a time when attention spans are shorter than ever, you'd expect that shorter and easier …