The internet promises to provide inexpensive access to treatment at any time of the day or night. Unfortunately, the potential for internet delivered services has not been realized. Studies examining treatments that simply provide access to an internet site commonly result in very high dropout after the first site visit, and typically little or no improvement target symptoms. A variety of methods to improve responses to internet interventions have been examined. In general, e-mail support improves adherence and telephone support can improve adherence even more. Another type of support that has only begun to be investigated is the use of social networks to help maintain adherence.