I agree--this can be pretty tough. I still haven't had much LD success with MILD, but I HAVE learned how to fall asleep with a mantra. I'd just repeat Checker666's advice--slow down the mantra. I find that "hearing" it more slowly (and possibly in a "deeper" tone) can help make it soothing rather than distracting. If I hear it in time with slow breathing it helps me block out other thoughts and I find myself drifting off while repeating it.