Before you begin a magic spell or ritual, you'll want to remove any unwanted energies from your person and from the sacred space where you'll be working. Some magicians take ritual baths before performing magic. Pour a few drops of a cleansing essential oil, such as pine, sandalwood, citrus, or eucalyptus, into your bathwater. If you like, burn candles and play relaxing music. Clearing your mind in this way also enables you to put the cares of the day behind you so they don't distract your attention.
To clear the area where you'll perform your spell or ritual, light a sage wand (a bundle of dried sage, tied together) or a stick of sage incense. Waft the fragrant smoke around the space until you feel the air is cleansed of any harmful, disruptive, or unbalanced energies. If other people will participate in the ritual with you, purify them before they enter the sacred space by waving the sage smoke around their bodies (front and back). You might also wish to draw a pentagram with essential oil on each person's forehead.
You can use a ritual dagger or sword to disperse negative energies, too. Hold your tool parallel to the ground with the point facing out while you walk around the space you are sanctifying. Or sweep the area clean with a broom — not just the floor, but the air as well — as Wiccans sometimes do. Some people ring bells, singing bowls, or chimes to chase away unwanted vibrations.