How to Center

You may at some point hear someone in the Pagan community -- or in a book, or on a website -- refer to the practice of centering. Much like grounding and shielding, in many traditions it's crucial that you learn to do this before you begin working magic. Why? Because it's the beginning of energy work, and if your tradition's magical practices are based upon the manipulation of energy, then you'll need to learn to center. If you've done any meditation before, it may be a bit easier for you to center, because it uses many of the same techniques. Here's how to get started.

http://paganwiccan.about.com/od/magicandspellwork/qt/Centering.htm