We come to you several times each week with insight, advice, and opinions from our various blog contributors. If you are a regular reader you may have figured out a few things about our authors: John Westerveld likes to comment on supply chain risk management topics, Trevor Miles is incredibly insightful, if a little verbose ;), and John Sicard can be pretty passionate. We believe this kind of insight is important in showing credibility and personality for the authors, the blog and the company. As such, each Friday for the next bit, we're going to give you a glimpse into some of the people that post to our blog via a short and fun 5-question interview. First up is John Westerveld, who is a demo architect for Kinaxis, and was previously a product manager. Enjoy! Where did you grow up? In and around Toronto, Canada. Favorite book, movie or song? Hitchhiker’s guide to the galaxy by Douglas Adams What book are you reading now? Jeffrey Archer; Honor Among Thieves Best advice you ever received: Never undersell your contributions but at the same time, never consider yourself to be irreplaceable. I learned this at my first job watching a co-worker (and friend), who thought he was irreplaceable, demand a raise and threaten to leave if he didn’t get it. He didn’t get it. He was asked to leave. What single piece of counsel would you offer to your colleagues in supply chain for the remainder of 2010? If you aren’t doing S&OP, you need to start now. If you are doing S&OP, you need to do it better. Never stop improving because your competitors won’t.