This monograph is intended to help the operators and planners of employment and training programs, particularly those sponsored under the Comprehensive Employment and Training Act (CETA), in developing and providing supportive services to improve client employability. The first section, presenting the purpose of this publication, is followed by a section briefly covering the history of supportive services in employment and training programming, and the implications for present-day programs. Section 3 describes nine individual supportive services, opportunities and constraints that each raises, and examples. The services covered are counseling, orientation, educational services, transportation, physical health services, mental health services, child care services, legal and bonding services, and use of local petty cash funds. Section 4 presents four different models that could be followed in providing supportive services. The fifth section discusses six elements in a supportive service plan, including identification and description of potential clients, determining unmet client needs, and setting priorities among unmet needs. A summary of the conclusions is presented in the last section. (EM)