You only ever experience two emotions: euphoria and terror. And I find that lack of sleep enhances them both. - Ben Horowitz

It turns out that is exactly what product strategy is all about — figuring out the right product is the innovator’s job, not the customer’s job. The customer only knows what she thinks she wants based on her experience with the current product. The innovator can take into account everything that’s possible, but often must go against what she knows to be true. As a result, innovation requires a combination of knowledge, skill, and courage.

Without trust, communication breaks. Here’s why: In any human interaction the required amount of community is inversely proportional to the level of trust.

Good product managers focus the team on revenue and customers. Bad product managers focus the team on how many features competitors are building. Good product managers define good products that can be executed with a strong effort. Bad product managers define good products that can’t be executed or let engineering build whatever they want (that is, solve the hardest problem).