The BEST way to improve your motor skills among the options provided would be to practice using activities that require more complex movements.
Engaging in activities that challenge and enhance your coordination, balance, and agility helps to refine motor skills effectively. This type of practice typically involves repetitive and varied movements that promote the neural pathways associated with motor control, leading to improved skill performance over time. While hiring a personal trainer or entering competitions can also be beneficial, the active practice of complex movements is fundamental for skill development.