Even if a few of this kind of tricks sometimes work, my experience is that their effect vanishes after a few days and you're back to square one. I guess it is b

Even if a few of this kind of tricks sometimes work, my experience is that their effect vanishes after a few days and you're back to square one. I guess it is because they are just tricks: your mind (well, mine, at least) can only be abused or abuse itself so long, and then it detects the trickery.