Nearly all of Steve Jobs’ presentations were divided into three parts. For example: When Jobs took the stage on September 9, 2009, he told the audience he would be talking about three products: iPhone, iTunes and iPod. Along the way he provided verbal guideposts such as “iPhone. The first thing I wanted to talk about today. Now, let’s move on to the second, iTunes.” The number three is a powerful concept in writing. Playwrights know that three is more dramatic than two; comedians know that three is funnier than four; and Steve Jobs knew that three is more memorable than.