Past life regression (PLR) is a therapeutic technique that uses light levels of hypnosis to activate memories, or from past lives. PLR is typically undertaken either in pursuit of a spiritual experience, or in a therapeutic setting where it can be used in an attempt to resolve emotional, psychological or psychosomatic problems.
Exploring your past lives can uncover areas of trauma that are having negative impact on your present life. Many links between past lives and current physical problems (even birthmarks located where you may have been injured in a past life) have been studied and proven.
By returning to that traumatic event during regression, you can often change the decisions you made at that time and remove its unhealthy effect on your life. Investigating lifetimes where you had skills as a healer, energy worker, shaman, etc., often results in these skills becoming accessible to you in your present life (this is true of more mundane skills too). Because you actually experience a past life during regression (in a safe manner), the skills become part of your waking memory and can be utilized from then on, even if you never had those skills before.
As you can see, each time you make a connection to a past life you learn new information about yourself as a soul. The rigid rules and roles you have accepted for yourself begin to loosen and dissolve. You become aware that you, as a being, are much, much greater than you thought. Thus, each time you expand your conception of yourself you expand the potential pathways available to accomplish the goals you have set for your life.