Full body or pore breathing. You visualise the energy you want to cultivate, I like to send my mind out as far to the edges of the cosmos as I can imagine, and see the energy flowing in and filling your body with your breath.
Then, as you breath in, instead of just breathing in through your mouth, see you entire skin all over breathing in the energy through your pores and energy points as well.
As the in breath completes, your body is full of light, or Qi.
Here’s the trick: on the out breath, visualise compressing that Qi into one of your Dan Tians. These are energy centers that act as storage for QI. Try to fill them, and compress the energy in them to pack more in, over and over. After a while they tend to start glowing in your minds eye.
Lusting after power is forbidden in qigong, but it’s known that as your qi cultivation improves psychic senses and ‘special functions’ as they are called, automatically awaken.
The third eye and heart chakras are pretty much in the same position as the upper and lower Dan Tians.
The lower Dan Tian centers about 2 finger widths down from your navel and the same depth inwards.
They all lie on the same circular path, which also crosses all meridians in the body, so you can run energy around that to help balance all the energy in your body across all organs and all meridians. It’s helpful after cultivating to consolidate and harmonise the energy and sort of seat it with you. (Link)