They awaken, always wide awake: Gotama's disciples whose mindfulness, both day and night,

is constantly immersed in the body.

-Dhammapada 299, translated by Thanissaro Bhikkhu

The mindfulness is found and maintained by focusing on your breathing...Conscious awareness and attention to inhaling and exhaling.
My mind dances like a flea, and even after all these years it is suprisingly easy for me to get distracted during mindful meditation. It works though, don't give up trying. love, ~R