Adrienne Cornelsen founded InSite, a digital marketing firm, in 1998, based on a sense that technology would combine with marketing to change how people interact. She says it's critical for business owners to join a supportive community and to focus on the long term. Had she been aware how long her business would last when she started out, Cornelsen said she would have "accepted wins and losses along the way without feeling like the world would come to an end if I made a wrong decision."

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