I had a chance to listen to a recorded lecture by Aleksandr Kudelin from Scatt. One of the main messages was that humans cannot focus attention to more than 1-2 tasks at a time. During a shot release one needs to keep under control at least three elements: hold, aiming and trigger release. Hold is the most important, and the most trainable element. One can train endurance of hold, stability, and coordination. Endurance is trained by holding a rifle or a dummy. Stability can be trained by a static aiming, or slow motion following a drawing, for example, a digit 8, spiral, triangle, or written letters. Coordination can be trained by eliminating the sight picture, for instance, firing to a white paper, or eyes closed.