If you spend your time watching your thoughts and trying to change them, then you'll be spending your time watching and changing your thoughts. don't get me wrong, positive thoughts are a wonderful thing, but it is not why your here. look within and find that spark of light that is your piece of creation and follow it where it takes you with an open heart and mind and you won't have to worry about your thoughts because you will feel so much love and joy that thought won't matter.