So, how much would you pay someone to sift through your email each morning, deleting the garbage and presenting you with the 5 (out of 500) emails you need to respond to? If you already have someone like that, lucky you! But if you don’t, I bet this sounds like a dream. In the age of a constant flood of information, consumers will pay good money for a filter. So if you want to sell books, be the go-to person for your market. If you’re wondering how to become a filter, giv…

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