The clinical practice of alcoholism treatment can be enhanced by the judicious use of standardized psychometric instruments to characterize clients during the course of treatment. Knowledge of key behavioral, personality, and alcohol-specific factors will increase the clinician's ability to select the most appropriate treatment option, or, even if treatment options are limited, at least to develop a treatment plant with the patient's unique needs in mind. Monitoring of progress towards treatment goals can also be facilitated by the use of selected assessment tools. Seven examples of well-validated instruments are discussed, with suggestions on how data derived from them may be applied in the treatment planning process.