Certain examples provide systems/apparatus, methods, and articles of manufacture for blood collection/processing instrument operator training and troubleshooting. Certain examples provide a system for platelet resuspension training. The system includes an interactive training application, provided 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 is to instruct the user regarding an appropriate motion and vigor for resuspension of platelets in a blood container associated with a blood processing instrument. The system includes a sensor to detect the user's motion of the mobile device. The system includes a processor to compare the user's motion of the mobile device to the appropriate motion and vigor for resuspension of platelets in a blood container and provide feedback to the user regarding the comparison.