If you want to be a bad product manager, only worry about managing your product. If you want to be a good product manager, investigate the universe outside your product.

If you want to be a bad product manager, assume your customers are not aware of your competition. If you want to be a good product manager, realize that customers will be comparing your product to others.

If you want to be a bad product manager, try to get everyone to agree on features. If you want to be a good product manager, get everyone to agree on goals.

If you want to be a bad product manager, don’t worry about the details of your product. If you want to be a good product manager, sweat the little stuff.

If you want to be a bad product manager, assume that people who don’t agree with you are irrational. If you want to be a good product manager, seek to understand the other person’s point of view.

If you want to be a bad product manager, just start being a product manager. If you want to be a good product manager, you need to work at it.

If you want to be a bad product manager, keep changing your mind about the strategy and direction for your product. If you want to be a good product manager, set the vision and direction for the product and make changes only as needed.

If you want to be a bad product manager, assume that domain knowledge is all you need to succeed. If you want to be a good product manager, make sure to have the right amount of knowledge about the domain in which you are working.

If you want to be a bad product manager, listen only to your customer needs when defining your product. If you want to be a good product manager, make customer needs the central but not the sole voice in product definition.

If you want to be a bad product manager, confuse product management with project management. If you want to be a good product manager, learn the difference between product management and project management.