Have you tried Centering Prayer yet? It is a meditative process in which you silently repeat a sacred word and, whenever you're distracted, gently come back to that word. Here's something quite wonderful about this prayer method:
You might like to read Cynthia Bourgeault's article entitled Silence is God's First Language. It's actually an excerpt from her book entitled Centering Prayer and Inner Awakening.
A nun, after her first try at centering prayer during a workshop led by Thomas Keating, came up to him in great frustration. "I’m such a failure at this prayer," she said. "In twenty minutes of sitting I've had ten thousand thoughts."
"How lovely," Fr. Keating responded, without so much as batting an eye. "Ten thousand opportunities to return to God!"