Does tapping pressure points, nlp, hypnotism help you lose weight.?

I lost count the amount of money I have spent on doing it this way, I bought the slim box of secrets which said I'd get my money back if it never worked and it didn't and i never got my cash back, I have bought paul mckenna book I can make you slim, I am reading lose weight now, the only reason I think it may not be working is I am not doing it all the time but how are u suppose to start tapping and huming at work to get rid of a craving, they will think I am crazy, why am I so gullible.