Preparing for ritual and magical work involves accessing a beneficial altered state of mind that allows for both openness and focus. Many traditions practice specific meditation and visualization techniques to strengthen this ability and call on it when needed. You can find information on meditation in Witchcraft or many other spiritual traditions. Seek out different kinds of meditation instruction and practice what works best for you. If nothing else, be sure to set aside time and space for solitude and reflection, preferably every day, but definitely before ritual and spellwork.