And when I look back at my own tenure as the CEO of my own company, I realize that most of the skills that made me successful in product development, marketing, management, or just collecting our receivables were just footnotes to that crash course in human nature that I got from sales.

FORBES: We're All Salesmen

Watch this video interview I did with Nimmy Reichenberg, VP Marketing at AlgoSec, one of the vendors of firewall policy management solutions.

FORBES: Reduce Policy Complications to Enhance Security

When I was the global vice president of service marketing for a Fortune 500 healthcare company, someone once asked me what percentage of time I spent in personnel management activities.

FORBES: How To Make Performance Reviews Relevant