Musicians have a lot to deal with while on the road. One of those things is the organization and sale of CDs, T-Shirts, and other merch. These days, it's the ticket and merch sales that pay for the gas, the new drumsticks and guitar strings, the food and drinks, and every other expense on tour. So musicians have to be smart about making as much money on the road as possible.

Today, an exciting startup exited private beta that I believe every musician who tours should sign up for immediately. It's called Square, and I've been publicly excited about it for a while now. At the helm is the guy who invented Twitter, which turned out to be a pretty good idea. The goal of the company is to make accepting credit cards dead simple.

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