If you want to be a bad product manager, push to start developing a product and release it as soon as possible. If you want to be a good product manager, consider your market window as part of your product strategy. Full story...
If you want to be a bad product manager, release all of your features at once. If you want to be a good product manager, save some features for later.
If you want to be a bad product manager, just focus on prioritizing features. If you want to be a good product manager, realize that your job is much more than prioritizing features.
If you want to be a bad product manager, copy everything that Apple does. If you want to be a good product manager, learn from the mistakes of Apple, including those related to the iPhone 3G S.
If you want to be a bad product manager, don't worry as much about defining the problem as quickly finding the solution.
If you want to be a bad product manager, make your decision about whether to buy, build, or partner on a product one in the same with your decision about whether to create the product at all.
If you want to be a bad product manager, rush an undifferentiated product to market in order to grab market share.
If you want to be a bad product manager, assume that once is enough to communicate anything important.
If you want to be a bad product manager, make your product everything for everyone. If you want to be a good product manager, make your product solve a specific problem for a specific type of customer.