ok, We are said to only use a small portion of our brain. Some people say 7%, some say 9% , some even say 3%. When we tap into our psychic selves, we use a little more than the percentage we normally use.
The right side of the brain , whic is the creative side, is said to be used when using psychic senses.
Everyone can be a psychic if its worked upon and some people are just born natrually more psychic.
I use this to explain- Some people are born natrually atheletic and some are coach potatoes, but each person, if they worked out and ate healthy food could be athletic and fit. The same as any person could be psychic if they worked at it, even if they were couch potatoes( psychicly speaking).
Regular meditations, including void meditation and meditations that work on chakras, particularly the third eye and crown,(but all chakras need to be worked upon) can aid in opening up you psychic senses, also visualisation and regular scrying can.
Being attuned as a reiki healer also aid the psychic ability.
The use of tarot cards are an aid too, as tarot cards are said to give the left side of the brain something to focus on while the right side is being utilized in a psychic reading.