These 21 foolproof sales tips will help you close deals faster and make tons of money

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Paramount Pictures

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Sales is hard. Some people say it's more art than science.

Selling can get especially tricky in today's tech environment, where things change so fast.

To help you master the art of selling, Salesforce recently published an e-book called "100 Sales Tips for 2016."

We put together 21 of the best tips from the book:

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