Is there any Drills to improve Accuracy to hit the Shuttlecock because I find myself losing the Rally because of my incorrect timing of swinging. Anyway to improve this?
You need someone to feed you the shuttles. He/she should be very good at feeding so you don't have to move that much and can focus on the stroke. When everything goes well you shots will improve and you can add more movement like go back to the central position after every shot.
Is there a pattern with your "inaccuracy"? Like always going to the left side, or right side? And mostly which shot? Also, how accurate are you expecting? E.g. if you're consistently hitting out to the left when you're on your left side of the court (assuming you're right handed), you might not have turned your racket face enough, or you turn your body too much. If it's a smash, you might want to reduce the power, and give more attention to control. Also, don't try to aim for the line. And when you practice, do set up a target for your shots to hit.
It's just practice, practice,practice and practice. You have to hit the same shot 1000000000000 times.