One of the skill or technique that you need to master is the net kill. The net kill enables you to win a point in a rally if your opponent is not able to reply your kill.
Usually after doing a tight net shot or sharp drop shot, your opponent will couldn’t respond to those shots with a good reply. In their weak reply, you just move as close as possible to the net to do a net kill to finish off the rally.
If your opponent manages to reply your net kill, it is most likely that you won’t be able to respond to his reply because all your body weight is already to the front of the court.
Practice this well so that you can gain points in a match. Good luck!