Re-tweeting is a pretty common practice on Twitter, but on an average day, we see maybe one out of 20 posts is a re-tweet.

Talking about 'stopping globalization' is unrealistic - and probably not what anti-globalization protesters actually want.

You can make the case that slacktivism is important because it makes people feel affiliated to a movement and be part of it, and talk about it.

Increasingly, I'm inspired by entrepreneurs who run nonprofit organizations that fund themselves, or for-profit organizations that achieve social missions while turning a profit.

I fear that I can no longer travel without technology. Twenty years ago, I loved getting on a bus in West Africa and taking off for a city I'd never been to before, relying on advice from out-of-date travel books and fellow passengers on the bus. Now, I end up using TripAdvisor, Yelp, and Google Maps. I probably eat and sleep better when I'm on the road, but I miss the mystery of travel when it was more random and unpredictable.

There's no locality on the web - every market is a global market.

[According to Twitter] 24 percent of American Twitter users are African-American. That's about twice as high as African-Americans are represented in the population.