Vocalize the mantra U.

In a completely relaxed posture, breathe in deeply. Exhale pronouncing the mantra U in a prolonged manner: "Uuuuuuuuuuuu..."

Visualize a golden sun within your abdomen or solar plexus. You can do this when waking in the morning, visualizing a cross within the physical sun outside that emanates its light and penetrates your abdomen, so as to provide you with Christic energy.