If you follow digital marketing, Derek Halpern needs no introduction. The insightful, intelligent posts he publishes to his Social Triggers website are so widely recognized that he’s able to boast of more than 300,000 subscribers who anxiously await his updates.But I wanted to know more about him than just the stats of his success, so I brought him in for an interview. Here are seven of the best lessons that came out of our conversation:1. Never lose your integrity.Halpern’s first major success was as the owner of a celebrity gossip site that racked up an impressive 40 million visitors a year from 2006 to 2007. The problem was that he dreaded waking up and spending another day making fun of people.