Centering is the beginning of energy work, and if your tradition is magical practices based upon the manipulation of energy, then you'll need to learn to center.
Find a quite place where you feel comfortable and won't be disturbed.Once you're seated, take a deep breath, and exhale. Repeat this a few times, until you are breathing evenly and regularly. This will help you relax. Some people find that it's easier to regulate their breathing if they count, or if they chant a simple tone, like "Om," as they inhale and exhale. The more often you do this, the easier it will become.
Once your breathing is regulated and even, it's time to begin visualizing energy. This may seem weird if you've never done it before. Rub the palms of your hands lightly together, as though you were trying to warm them, and then move them an inch or two apart. You should still feel a charge, a tingling sensation between your palms. That's energy. If you don't feel it at first, don't worry. Just try again. Eventually you'll start to notice that the space between your hands feels different. It's almost as though there's a bit of resistance, gently bring them back together.
Now focus on that area of resistance. Close your eyes, and feel it, visualize that tingly area expanding and contracting, . Some people believe you can actually try pulling your hands apart, and stretching that energy field out, as if you were pulling taffy with your fingers. Try visualizing the energy expanding to the point where it surrounds your entire body. After some practice, according to a few traditions, you'll even be able to fling it from one hand to the other, as if you were tossing a ball back and forth. Bring it into your body, and draw it inward, shaping a ball of energy inside yourself. It's important to note that this energy (in some traditions called an aura) is all around us at all times. You're not creating something new, but simply harnessing what's already there.
Each time you center, you'll repeat this process. Begin by regulating your breathing. Then focus on your energy. Eventually, you should be able to control it completely. The core of your energy can be wherever it feels most natural for you -- for most people, it's ideal to keep their energy centered around the solar plexus, although others find the heart chakra to be the place.By learning to center, you'll develop a foundation for energy work in a number of ways.