Research suggests that people who attended a three-month meditation retreat showed improvements in their attention span afterward, compared to a group of people who hadn't attended.
But Prakash says it's not necessary to shell out for an extended period of silence in the mountains:
At any point when you are breathing, you have the opportunity to practice meditation. One of the easiest ways of doing this is by focusing on your breathing, really focusing on the air, how it touches your nostrils and upper lips as it enters, how it feels on the back of your throat, how it feels as it escapes. Just focus on this for some time.
You'll find that you feel restless, that your mind wanders and there's an endless and (sometimes absurd) chain of thoughts that will follow. Whenever you notice yourself drifting to other thoughts, gently bring your mind back to focusing on the breathing.