Go to any wooded area or a garden and lay, your head facing North, on your back. Calm yourself and feel your body 'melting' into the Earth, becoming one entity. Listen. Feel. Imagine your whole existence and spirit forging deep within the Earth. Hear the Earth Goddess. Feel the pulsating rythum of the Earth. When you feel ready, you may say this or another invocation:
"Hail to the North, forces of Earth. Devas and spirits who dwell within the ground. I honor thee and ask for thou blessings, that I may live my life in thou honor. To be balanced; mind, body, spirit. As I will it, so be it done."
Lay there for as long as you please, meditating on the stable, balancing, and fertile Earth. Take some soil home with you to secure the power. This soil may be used in spells dealing with balancing, grounding, and plant magick.