When it comes to the use of body language, you will find no specific way of using this important form of communication. Once you have done a particular thing without your body, it will be interpreted in a number of ways and the only thing that affects it is the setting and the individual being spoken to. For instance, you might want to use body language very carefully when you are speaking to a senior person in the company as compared to talking to a guy or girl you are in love with. There are a number of ways of ensuring that your body has effectively communicated through this non-verbal form of communication.
If you are to change your body language, you must know how you use this form of communication. Notice the way you stand, sit, use your legs and hands including what you are always doing while talking to another individual. The best thing is approaching a mirror and practicing your different forms of body language. At first it will look silly but since no one is looking, you will get first hand information on what people see when you are talking to them, something providing you with a wonderful chance of practicing exactly what you want the world to know about you.
You can also harness body language by closing the eyes and visualizing in your mind how you intend to sit and stand to build confidence, especially if you are going to communicate something before people. Once you have done that, practice to be that individual you have seen in your mind. Also, you can look at role models, action superstars, friends and individuals whose body talks are very superior. Keep observing the things they do not do and what they are always doing.
Learn as much as you can from the way others use their body language to communicate fully through your own.