Written to provide a brief introduction of online resources and searching the Internet, this document highlights Internet sites relating to alcohol, tobacco, and other drug (ATOD) prevention. Information is provided on the following topics: (1) software and hardware needed to access Internet sites; (2) the variety of online services available; and (3) basic search strategies. An annotated directory of useful Internet sites related to alcohol, tobacco, and drug prevention comprises roughly half the publication. Each entry lists the site title, an evaluative description, brief subject classification, the internet address, server type, an electronic mail contact, and a "hotlist" recommendation regarding the value of the information contained within. Also contains a short bibliography of related books and journals. (SR)