Diet, exercise, and glucose-lowering medication are first-line treatments for type 2 diabetes, but morbidity and mortality remain high because many patients do not adequately adhere to these treatments. Treatment adherence provides its greatest health benefits (e.g., avoidance of diabetes-related complications such as renal disease) only after months or years of sustained lifestyle change; however, accumulating evidence demonstrates that individuals suffering from type 2 diabetes and related disorders (e.g., obesity) rapidly devalue the future and show a bias for immediate gratification. The overall goal of this project is to improve treatment adherence in type 2 diabetes using an episodic future thinking intervention (i.e., mental prospection) designed to increase valuation of the future.