1. A computer-implemented method of training an operator for platelet resuspension, the method comprising: providing an interactive training application via a mobile device to train a user to resuspend platelets in a liquid medium prior to its storage and/or transfusion to a patient, the training application to instruct the user regarding an appropriate motion and vigor for resuspension of platelets in a blood container associated with a blood processing instrument; detecting, using a sensor, the user's motion of the mobile device; comparing the user's motion of the mobile device to the appropriate motion and vigor for resuspension of platelets in a blood container; and providing feedback to the user regarding the comparison.