Warning: This document was written 15 years ago and is probably not relevant for today’s product managers. I present it here merely as an example of a useful training document.
Good Product Manager/Bad Product Manager by Ben Horowitz.
Good product managers know the market, the product, the product line and the competition extremely well and operate from a strong basis of knowledge and confidence. A good product manager is the CEO of the product. A good product manager takes full responsibility and measures themselves in terms of the success of the product. The are responsible for right product/right time and all that entails. A good product manager knows the context going in (the company, our revenue funding, competition, etc.), and they take responsibility for devising and executing a winning plan (no excuses).
Bad product managers have lots of excuses. Not enough funding, the engineering manager is an idiot, Microsoft has 10 times as many engineers working on it, I’m overworked, I don’t get enough direction. Barksdale doesn’t make these kinds of excuses and neither should the CEO of a product.