Throughout the couple of years that I got myself involves in table tennis (tt), I notice that the following are some of the mistake a beginners make (including myself) :
1) Spin - many tt beginners cannot read the spin of the ball correctly. A beginner watch a good player, and see the different tactics that player employs to win each rally. To improve, I would suggest that the beginner, after seeing these shots that have spin on them, to try to mimic these shots during your own game.
2) Speed/smashing - smashing the ball is a skill that is obtained through constant practice. I advise all beginners to work on speed/power which is an integral part of the game, but it is not the most important part. Therefore make sure you have perfected the other areas of your game before you practice smashing the ball. Beginners do not realize that when you hit the ball with a lot of power, you have to adjust the angle of your paddle, this is the reason that most beginners who try to smash the ball miss the table, and lose the rally.
3) Shots that are smashed or that were hit in perfect spots (Aim/accuracy) - is the easiest to correct out of these three mistakes. Aim the ball, and hit the ball nice and smoothly, not hard. Aim is something that will become natural to you, If you practice regularly, you will not even think about where to hit the ball, it will just go right over. Take it slowly at first, one part at a time and after you have mastered one skill (aim/accuracy) you can go on and practice the next skill (either smashing or spin). The most important thing is to practice as the saying goes, "Practice Makes Perfect".
Cheers.



