In today’s time of fast changes and quick resolutions, stick to 7, the number for happiness, love and success – 7 simple ways to a smarter, simpler life, 7 ways to define time, synthesize ideas, and keep your mind performing in an era of distractions, 7 wonders of the world, 7 or less ingredients to a fine meal, 7 habits of highly effective people, and so goes the list.