The purpose of a customer isn’t to get a sale. The purpose of a sale is to get a customer. — BILL GLAZER, ADVERTISING - Josh Kaufman

Many things aren't fun until you're good at them . Every skill has what I call a frustration barrier, a period of time in which you're horribly unskilled and you're painfully aware of that fact.

A good salesman, as the old (and politically incorrect) saying goes, can sell a refrigerator to an Eskimo. It's a cliché, but there's some truth to it: Inuit who live above the Arctic Circle use insulated refrigerators to keep their food from freezing in subzero temperatures

these foundational business concepts mental models, and together, they create a solid framework you can rely on to make good decisions. Mental models are concepts that represent your understanding of “how things work.” Think of driving a car: what do you expect when you press down on the right-side pedal? If the car slows down, you’ll be surprised — that pedal is supposed to be the accelerator. That’s a mental model — an idea about how something works in the real world.