To effectively counter an opponent with a strong forehand smash, focus on varying your shot placement and speed to disrupt their rhythm. Utilize a mix of deep, angled shots to push them toward the corners, forcing them to stretch and potentially compromise their positioning. Incorporate drop shots and change the pace of your shots to throw them off balance and prevent them from setting up for powerful smashes. Additionally, maintain a low center of gravity and stay agile to respond quickly to their attacks, ensuring you’re ready to counter with well-placed returns. Lastly, anticipate their tendencies and position yourself strategically to exploit any predictable patterns in their play.