In each case they use small tricks. A singer imperceptibly controls the timbre of his voice by the position of his fingers, the merchant handles the buyer’s psyche before he rises prices. To work successfully in physics it is also necessary to know and use some of the rules that are not directly related to this science. They have become necessary in our time, when researches have gained tremendous scope and the way to results has become longer. Further, theoretical calculations and experiments have become heavily relied on the computer. The use of this machine is expected to facilitate the work of human and accelerate the achievement of results. In fact, the computerization of research sometimes leads, on the contrary, to their prolongation and errors. The reason often is that it becomes difficult for a human to operate the machine as its power and the size of code grow. Using in practice a set of rules known in physiology, psychology, linguistics and other humanitarian fields of knowledge can help to cope with these new challenges.