To effectively return a serve with a lot of backspin, position yourself early and anticipate the ball's trajectory. Use a compact, low-to-high swing to counter the backspin; this motion allows you to lift the ball over the net while also generating your own topspin. Focus on hitting the ball just above its equator to help negate the backward rotation and create a clean stroke. Additionally, aim to maintain a firm wrist to prevent any excessive flexing that could result in an unforced error. Timing is crucial, so try to meet the ball as it rises from its low bounce, allowing you to execute a controlled, forward-moving shot.