Subliminal Messages for Self-Esteem/Confidence?

I know there's lots of debate/research on whether this does or does not work. Whatever the case, I would still like to try it. Does anyone know any links or something like that where I can download the audio for self-esteem and/or confidence (I already looked over youtube). Also once I get the audio, when am I supposed to listen to them? Any specific part of the day, all day, only while a sleep?