If you are a right handed person, then most of the time you are
stimulating the left part of your brain. Now, if you use
your left hand in doing certain tasks, then you are able to
stimulate the right side of your brain as well. By doing so,
you are awakening the part of your mental faculties that is
intuitive and creative. On the other hand, if you are a left
handed person, and you use you right hand in doing simple
tasks, then you are stimulating the side of your brain that
is rational and organized.