Grounding is absolutely the number one priority when practicing magic. If you cannot ground yourself, or connect with the vibrations of the earth, you cannot raise the energies necessary to send your energy out to the universe.
Ground is accomplished by sitting on the ground, slowing down your breathing and listening to your surroundings. If there's a breeze notice its rhythm. If you feel the suns rays, let it envelop you. When you are calm, feel the earth. Allow the energy to flow up through your spine. Feel the earth as its pulse flows through your fingers.
When this is done, and you are ready, cast your intentions to the universe.