Here is a full ritual:
Take a wand and trace a pentagram of grey light above your head, point to it's center and pronounce OM-G-N slowly and while breathing out in order to charge the pentagram. This should help to banish any unwanted forces. Next repeat the following incantation: 'by god/goddess may my spell come to be without harm unto any creature.' Imagine the goal of your spell, breathe slowly letting the thought build up energy. Next, stretch out your arm and let the energy go down your arm and out the palm of your hand and into a candle. Repeat the spell as necessary.