Primary targets are usually youth who are either using/abusing alcohol or other drugs; exhibit behavioral or academic problems or stress that could be related to alcohol or drug use; or are at particularly high risk of developing alcohol or drug problems, such as living in an alcoholic home. There are many variations of programs and services that can be considered as early intervention. What all early intervention programs do have in common is the challenge of identifying a youth at high risk or in trouble and effectively linking him or her to the most appropriate service or intervention. Some basic early intervention program types include student assistance, peer counseling, and neighborhood-based early intervention. There are a number of key concepts and points which will aid planning, development, and service delivery. These include not assuming that a youth is alcoholic or chemically dependent; developing clear, consistent roles, responsibilities, and policies; and developing trust and credibility. 7 references.