Hammer says he first became interested in technology while making a music video in the '90s. He heard that videos could be accessed via the Internet, but the technology was still too new. "So I stuck with it all the way from '94 to YouTube," he says. "If you look on YouTube, you'll see me there when their [offices] were on top of a pizza parlor and only had three or four computers."

Today, Hammer says he spends most days in California's Silicon Valley. "On a day-to-day basis, I'm loosely involved with about eight [technology] companies that I'm excited about," Hammer says. "Everything from advising to consulting to investing in, it keeps me busy 10 to 12 hours a day."

Watch Hammer discuss a new app that turns social media into a digital magazine. Watch

Between meetings, Hammer uses Twitter to communicate with more than 2 million followers.


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