They come from music, politics, travel, the Internet. They are in every ad you see and every magazine you pick up. They evolve everywhere. And they can come from anywhere. Before you can spot them, however, it's important to know the difference between a fad and a trend.
Fads are like crushes.
They burn fast and hot but die quickly and often leave a bitter taste. They don't survive because they are not grounded in anything real. They were not rooted in anything with foundations. Trends, on the other hand, are most important when they emerge from a behavioral shift or psychological belief that gives them reasons for existing. These come from the way people think, and they develop over a longer period of time.