Let me elaborate. For each of these principles I will scratch the surface as to why it's true and how it might be applied. Each of these is worthy of several workshops in their own right. Resources spent on email strategies are more valuable than the same resources spent on web strategies. However unglamorous it might be, email is the killer application of the Internet.
People visit far fewer websites than they get email messages.
Email messages are treated as To Do items, while bookmarks are often forgotten. Email is always a call to action. Email is handled within a familiar user interface, whereas each website has to teach a new interface. Email is a very personal medium. Stop obsessing about how many hits your web site gets and start counting how much email interaction you have with your stakeholders.