In this work we present the results of a study aimed at increasing performance quality in conference interpreting trainees through the development of the attention–regulatory practice of mindfulness. A review of the basic concepts of attention is presented as well as a review of the role of attention in interpreting as an extremely cognitive demanding task. The authors also introduce and review the concept of mindfulness from a theoretical and empirical perspective. Stress in interpreting is also addressed as a factor that may influence performance. An experimental study is presented in which focused attention practices are compared to relaxation practices in relation to performance in interpreting trainees.