Anorexia is not fun, I havent eaten in two or so days more than a morsel, with stuff like this you've got to first change your diet so you don't eat badly, then acctually do some physical exersize maybe start cycleing to school or something.
Personally I always did those things but had a crazy slow metabolism so wieghed about 180 and was 6'1, now I'm about 160 and 6' but I feel terrible (yes I'm shrinking), I won't go into the medical root cause of these things but it's a horrible thing to go through and very risky to your health, if those tapes did work they'd put you down a terrible path.