I printed off a post on Sunstone about Mormon Mantras
by a guy named Philip McLemore and studied it. I'm going to study it more, but I recommend it as a guide for meditation. Maybe beginning meditation.
I have wavered in my mantras in my two efforts in the last week at meditation. One was "Jesus, thou son of God, have mercy on me, a sinner" and the other "Create in me a clean heart, o Lord."
I haven't done it enough to know if I will have the same results as Mr. McLemore, but I'll report back. I think there might be something to it.
Here's the link: http://sunstoneonline.com/magazine/issues/141/141-20-31.pdf