Seems simple, but many players lose sight of the ball. Focus on it until it hits your strings.
Serve
Use a fluid motion, toss the ball consistently, and snap your wrist at contact. Remember, the serve is the only shot you have full control over. Practice it diligently.
Groundstrokes
Rotate your shoulders and hips, transfer your weight from back foot to front, and follow through.
Mix It Up
Variety in shots (like slices, drops, and topspin) keeps your opponent guessing.
Stay Present
Forget the last point, whether it was good or bad. Focus on the current one.
Wall Practice
If you don't have a partner, a wall can be a great ally to improve stroke consistency.