Building a contact list is of utmost importance. Without it, as Janet Legere says in the video, is a watse of time. If "The Dragons" from "The Dragons Den" paid 2.5 million dollars for 20% of a company, do you not think that building a list online may be important to you too? Watch this short video:
http://nanaonline.org/building-a-contact-list-building-a-list-online