Most people learn how to use mind control, as they practice it. It is a good idea to learn from your mistakes, but it is much better to learn how not to make them in advance.
It is perfectly natural for novice hypnotic mind control practitioners to make some mistakes, when applying the different techniques. That is why you should not hesitate to get as much advice on how to use mind control as you can.
I would definitely recommend using your skills and power to help other and not just to make them do what you want. For instance, if a friend of yours is feeling down, you can readily hypnotize him to make him feel happier, more confident and more optimistic.
This will not only help your friend. You will enjoy a great opportunity to practice, without being afraid that you might fail and lose. Even if you fail, you will know that you have tried to help.
It is never a good idea to stick to what you know every time you apply mind control. This is what I have learned from experience.
A specific technique, such as the handshake patter interrupt, may work excellently on many people in different occasions. However, if it does not work one time, you have to have a spare technique ready to use instead.
What I am trying to say here is that you should be flexible. No two people and two situations are alike, so you should never make hypnosis a routine process, if you know how to use mind control.
It is a good idea to experiment, especially in occasions like the one described above, in which no one loses anything.