I have found such things as recorded affirmations to be useful from time to time. I'm not a huge absolute believer in them, but at the right time and place, when you are in need of a boost or some positive input, I think they have their place.
I think there is another component to these things in that they are ultimately dependent on ego, and on words and belief, and a constructed self image, that type of stuff. As you progress on the meditative path, there is less and less "there" to respond to the material. But, again, I do feel they are useful up to a point for their positive input, and on a psychedelic journey, sometimes that kind of thing can make the difference between a mediocre trip, and say, a full blown skull blasting ecstatic mystical experience. Here are some of my recommendations: