Researchers found that the more options offered in a company retirement plan, the fewer people participate in that plan. Similarly, when experimenters offered only six flavors of jam, 30% of the people who approached the display bought any jam. When the experimenters offered 24 flavors, only 3% bought some. Therefore, instead of trying to offer every color, size, and price point of gizmo, you might want to reduce the choices to increase sales.
— Guy Kawasaki, sharing insight from “Yes! 50 Scientifically Proven Ways to be Persuasive”