Techniques that can improve agility in athletes include ladder drills, cone drills, and plyometric exercises. Ladder drills enhance foot speed and coordination, while cone drills improve quick direction changes and overall agility. Plyometric exercises, such as jump squats and box jumps, develop explosive power and speed. Incorporating these routines into training regimens can significantly enhance an athlete's ability to react and change directions efficiently, leading to better performance across various sports.