Magick vs Magic
Crowley defined magick as "the Science and Art of causing Change to occur in conformity with Will."
For Crowley, the practice of magick—although it equally applies to mundane things, like balancing the checkbook—is essentially to be used for attaining the Knowledge and Conversation of one's Holy Guardian Angel (which he believed was the first step necessary for spiritual attainment). Since achieving this state with one's "Silent Self" can be extremely arduous, magick can be used not only to reach that particular goal, but to clear the way for it as well.
High vs. low magick
Although he referred to magick as a "high" art, Crowley himself did not use the term "low magick." Rather, he compared magick—which he saw as the essential method for achieving enlightenment and doing one's sacred Will—with practices he referred to as witchcraft or sorcery. The essential difference, from Crowley's point of view, is one of intent, where the purpose of a magical event is either in service to the True Will (which he referred to as the Great Work) or to the individual ego. Within this framework, ego- or vanity-driven practices like love charms, fascinations, or fortune telling tend to fall into the latter category.
Techniques of magick
There are several ways to view what magick is. Again, at its most broad, it can be defined as any willed action leading to intended change. It can also be seen as the general set of methods used to accomplish the Great Work of mystical attainment. At the practical level, magick most often takes several practices and forms of ritual, including banishing, invocation and evocation, eucharistic ritual, consecration and purification, astral travel, yoga, sex magick, and divination.
Other magical practices
The Tree of Life is a tool used to categorize and organize various mystical concepts. At its most simple level, it is composed of ten spheres, or emanations, called sephiroth (sing. "sephira") which are connected by twenty two paths. The sephiroth are represented by the planets and the paths by the characters of the Hebrew alphabet, which are subdivided by the four elements, the seven classical planets, and the twelve signs of the Zodiac. Within the western magical tradition, the Tree is used as a kind of conceptual filing cabinet. Each sephira and path is assigned various ideas, such as gods, cards of the Tarot, astrological planets and signs, elements, etc.
A magical record is a journal or other source of documentation containing magical events, experiences, ideas, and any other information that the magician may see fit to add. There can be many purposes for such a record, such as recording evidence to verify the effectiveness of specific procedures (per the scientific method that Aleister Crowley claimed should be applied to the practice of magick) or to ensure that data may propagate beyond the lifetime of the magician. Benefits of this process vary, but usually include future analysis and further education by the individual and/or associates with whom the magician feels comfortable in revealing such intrinsically private information.
borrowed material from Wikipedia