If you take yourself as just one kind of animal made of flesh and blood, then talk of psychology is not for you. The fact is that humans have infinite potential -- except that they have forgotten about it. All this potential is psychic (or mental). In fact, most of it is hidden in the subconscious mind. If you wake this up, you have all the resources to become what we call superhuman. Psychology is merely a branch of studies dealing with human mind. Even psychologists have miles to go before they find out the real potential of mind.
The ideal way to explore potentials of mind is meditation. If that is hard one can try music (embedded with binaural beats, etc) that directly alters consciousness. You can go into states of deep meditation, gain telepathic powers, become highly creative, and do many other wonderful things by altering brainwaves. It is both simple and fun.