Have you tried the 90 day mind power techniques

I read a book a few years ago now called mindpower into the 21st centrey by john kehoe,In this book he recomends doing mind power techniques [visualisation,affirmations,seeding,thankfullness,self image]every day for 90 days,to get results....has anyone tried this?...or even heard of this idea?...what are your views on this approch? Tweet