You may at some point hear someone in the Pagan community -- or in a book, or on a website -- refer to the practices of centering, grounding, and shielding. In many traditions it's crucial that you learn to do these before you begin working magic. Centering is essentially the foundation of energy work, and subsequently magic itself. Grounding is a way of eliminating excess energy that you may have stored up during a ritual or a working. Finally, shielding is a way to protect yourself from psychic, mental, or magical attack. Let's look at all three of these techniques, and talk about how you can learn to do them.
More at source: How to Magically Ground, Center, and Shield
More at source: How to Magically Ground, Center, and Shield