Avoid pointing the racket down during preparation, keep elbows close, prepare with your core, point the racket towards your target, and finish your motion above net level, moving forward.
This lesson from the coach is very practical if you find yourself often hitting the ball into the net. They focus on simple, fundamental adjustments to your preparation and follow-through. Understanding where your racket is pointing and finishing your motion correctly can drastically reduce these basic errors. This is solid advice for building a more consistent game.