Gopal Shenoy offers some pretty good advice for us all in The Top 11 things I learnt at SolidWorks in the last 11 years. My favorite is, as you might imagine,

7. Be “market driven” and not be “marketing driven”. There is a big difference: Never thought how big a difference adding “ing” to a word could make.

I'm convinced that developers want to be market-driven but no one wants to be marketing driven. Those marketing people don't buy our products, do they?