Tantra says, take this world as your fate and do not be worried about it. Once you take it as your niyati, as your fate, you accept it, whatsoever it is. You are not worried about changing it, about making it different, about making it according to your desire. Once you accept it as it is and you are not bothered by it, your total energy is relieved, and then this energy can penetrate inwards.
These techniques can be helpful only if you take this attitude; otherwise they will not be helpful. And they look so simple. If you start them directly as you are, they will seem simple, but you will not succeed in them. The basic framework is lacking. Acceptance is the basic framework. Once the acceptance is there in the background, these very simple methods will work wonders.