In order to hit an effective volley you need a very compact swing. But sometimes just the swing is not going to be enough to impart speed through the
ball. So what you need to do, you need to use
your body. Ideally, you want to try to move through the shot every single time so instead of that, if you have a chance, it should look like that. Same thing with a
forehand instead of this, it should look like that.
Every time you can move through the shot.