If you want to be a bad product manager, focus on how your product’s requirements should be implemented. If you want to be a good product manager, focus on what requirements should be in the product in the first place.

If you want to be a bad product manager, assume your boss is trying to get in the way. If you want to be a good product manager, work with your manager to help improve your effectiveness as a product manager.

If you want to be a bad product manager, respond to every feature request that comes in from the market. If you want to be a good product manager, track high-level customer needs and requests and prioritize them over the long term.

If you want to be a bad product manager, avoid asking awkward or naive-sounding questions. If you want to be a good product manager, do not be afraid of asking what may seem to be dumb questions.

If you want to be a bad product manager, assume you know how all of your customers will use your product. If you want to be a good product manager, continue to learn more about new and different ways customers will use your product.

If you want to be a bad product manager, react to fads. If you want to be a good product manager, be on the lookout for trends.

If you want to be a bad product manager, stick with what has always worked for you and ignore advice. If you want to be a good product manager, seek out opportunities to get feedback.

If you want to be a bad product manager, spend as much time as possible on the middle of the development projects. If you want to be a good product manager, spend as much time as creating the vision for the product and communicating that vision to the market.

If you want to be a bad product manager, focus on solving problems for one customer.
If you want to be a good product manager, focus on solving issues and creating solutions for a large number of customers.

If you want to be a bad product manager, just focus on the customer of your product. If you want to be a good product manager, create a product that will meet the needs of your customers and your users.