Traditional sales and marketing involves increasing market shares, which means selling as much of your product as you can to as many customers as possible. One-to-one marketing involves driving for a share of customer, which means ensuring that each individual customer who buys your product buys more product, buys only your brand, and is happy using your product instead of another to solve his problem. The true, current value of any one customer is a function of the customer's future purchases, across all the product lines, brands, and services offered by you.
Your peer group are people with similar dreams, goals and worldviews. They are people who will push you in exchange for being pushed, who will raise the bar and tell you the truth. They're not in your business, but they're in your shoes. Finding a peer group and working with them, intentionally and on a regular schedule, might be the single biggest boost your career can experience.
And it doesn't matter to me whether you're running a coffee shop or you're an intellectual or you're in business or flying hot air balloons. People who can spread ideas, regardless of what those ideas are, win. But consumers, they got way more choices than they used to and way less time.