Music a great tool for changing mood... speeding up or slowing down of thinking. If you are trying to quieten the mind while meditating use a chant or mantra. Whenever you find yourself distracted by thoughts just gently remind yourself you'll think about that later but for now you are doing this.
Ultimately if you are concerned about one particular topic that keeps recurring and you want it to stop. An unusual technique that of going right into it... analysing it in full detail just keep going until you've found the true reason why you keep thinking about it and at a short point it becomes clear. When it becomes clear... you understand it then it no longer will obsess you. I often meditate on topics using this method and myself letting go . The tapes from the Sedona course help you go into it better with your feeling and heart and release that way. Since you probably don't have the Sedona tapes. I suggest rather than trying to turn it off... really go into it write about it, talk outloud to yourself about it, notice how you feel about it, Go as far as you can with it to find out what it really is.
Alex
