I wasn’t in the audience at the time, but the very first time I saw the video of Steve Jobs presenting the iPhone to the world I was in...
"Management: Tasks, Responsibilities, Practices" by Peter Drucker
In many ways, I think enterprise tech has it all wrong from a sales & marketing perspective. We build massive sales teams, spend inordinate dollars on marketing, and yet the ROI on those investments barely eeks out any profit. Just look at the profit numbers (or lack thereof) for public SaaS companies if you do not believe me. It is the classic spray and pray model and it is broken. Maybe we are thinking about it all wrong.
Thanks to Jerry Neumann for reminding me of this quote.