Every app or service that sets out to change the world needs to start the same way: by changing the life of a single customer. So no matter how bold your vision, you still have to go through the same steps of iterative development. Today’s guest, Dana, wants to transform Global literacy, but Marc brings her down to earth, sharing his tips on how to develop big ideas. Rule number one? Make sure it does what at least one person wants it to do.  

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