When you want to do a service, never ever show your opponent the kind of serve that you are going to do with your body position. Your body must turned around so that you can use your upper waist power to serve the shuttle.
For your footwork, you must always use the strength of your ankle so that you can push out with more speed and power.
Another simple thing that you need to take note is that your grip must always be correct. In this video, the player didn’t grip correctly when hitting the backhand thus making him only can make one kind of shot only instead of other shots like the drop shot, straight drive and etc.
Enjoy this educational badminton video so that you can improve youg game.