“Drug Courts improve outcomes for drug-abusing offenders by combining evidence-based substance abuse treatment with strict behavioral accountability. Participants are carefully monitored for substance use and related behaviors and receive escalating incentives for accomplishments and sanctions for infractions. The nearly unanimous perception of both participants and staff members is that the positive effects of Drug Courts are largely attributable to the application of these behavioral contingencies … Scientific research over several decades reveals the most effective ways to administer behavior modification programs. Drug Courts that learn these lessons of science reap benefits several times over through better outcomes and greater cost-effectiveness” (p. 1). This publication describes the following science-based practices (also known as evidence-based practices): the carrot and the stick; trust but verify; timing is everything; staying centered; fishing for tangible resources; do due process; whether sanctions or therapeutic consequences; first things first; and phase advancement. Practice Pointers are also provided for each behavior modification strategy.