By working on your chakras, especially the upper ones above the heart chakra. By doing a lot of pranayama, and directing the energy to the specific psychic centers. By practicing yoga asanas and programming the energy afterward to specific psychic areas, this process generally occurs "by itself" as the energy pathways slowly start to open up, facilitating the flow of energy. Then lastly, the above-mentioned advice. Practical training for visualisation is required.
There's more, but these will get you started. Please read the ToZ for more info.