"Get a solid understanding of who your core customers are"

"But let’s say you’re a small organization—a group of restaurants, say, or a retail chain with just a few locations. You don’t have anyone on staff with a statistics background, and you can’t afford to hire such a person. There’s one thing you can do to ensure that you make informed decisions and don’t let the numbers lead you astray: Get a solid understanding of who your core customers are, what their value is to the company, and what your objectives are. Learn which customers are profitable and which ones aren’t, and decide what you want to do to increase the profitability and number of good customers. Use that information as the center point of all your decisions.
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Will that cure your inattention blindness? Maybe not entirely, but if you can get a good understanding of what distinguishes a good customer from a bad one, and a sense of what makes your good customers tick, you’ll immediately cut half the noise out there. That will make it a lot easier to see the opportunities that are staring you in the face."

Trecho retirado de "Can You See the Opportunities Staring You in the Face?"