As we kick-off 2016, I reached out to my entrepreneur network and asked, “What was your biggest ‘lesson learned’ last year?” Introspection is a very valuable entrepreneurial trait, and the best are very good at it.  The entrepreneurs polled lead companies ranging from enterprise cloud software firms to internet direct-to-consumer.  The common trait?  All are in market and trying to drive market adoption.  I have organized the entrepreneur challenges into common buckets for easier consumption.