Marketing based on facts, not fantasies, is important for business success. Some key marketing facts are that 39% of B2B companies using Twitter and 41% using Facebook have acquired customers from those channels, blogs that are updated at least 20 times per month generate 5 times as much traffic and 4 times as many leads as blogs updated less often, and email usage is declining by up to 59% across all age groups. Marketers need to separate facts from fantasies to effectively reach customers.