Kabbalah is not mysticism. It is a science. It does not have anything to do with red strings, holy water, or lucky charms. Neither it is concerned with tarot cards, religion, or ritual. These concepts may be valid physical phenomena, but they are not authentic Kabbalah.
It is rather, a system of realising a direct attainment with nature (also called 'Creator'). It does this by leading the researcher through a series of realisations. These realisations are observable, internal phenomena. This Creator is nothing more than the force that exists outside of the creature (which is you).
Touch your eyes. What is really outside them? Everything you sense is created in the brain, inside you. There is a force outside your consciousness feeding you data, which is then interpreted based on the qualities within you (like any sensor on a device). Kabbalah allows the researcher to ascertain the qualities of this external force, and to become equivalent to it. In other words, it provides a framework of reference for one to adjust their own internal sensors to correctly perceive reality, free from the constraints of egoism.
Kabbalah has been misinterpreted greatly. Some people see celebrities do it, others see mystics. In my case, I found this very discouraging. But true Kabbalah is a scientific process, which uses a combination of feeling and rationality to facilitate its aims. It is life, the universe, and everything, presented openly in the form of text, graphs and charts.
For an introduction to traditional Kabbalah, visit http://www.perceivingreality.com, or for more information, visit http://www.kabbalah.info. Another good place to start is right here at Introduction to Kabbalah.