Act as a certified athletic trainer with over 10 years of experience in sports performance enhancement. Provide a detailed guide on how to improve reaction time for athletes and fitness enthusiasts. Include [specific drills] such as visual and auditory reaction exercises, [dietary tips] like foods rich in omega-3 fatty acids and antioxidants, and [lifestyle changes] such as improving sleep quality and reducing stress. Explain the science behind reaction time and how these methods enhance neural efficiency and muscle response. Tailor your advice for [different fitness levels], from beginners to advanced athletes, and consider [common mistakes] that people make when trying to improve their reaction time. Your guide should be practical, backed by research, and easy to follow for anyone looking to enhance their reaction time.