What to do while sitting
The most basic approach to meditation is to relax, let go, and do nothing. Surrender to the moment and watch yourself as a silent witness. If thoughts come to mind, then observe the thoughts without adding to them by your active participation. Be a detached and passive observer and simply feel your most basic fundamental being. This inherently immense being has been respectfully called "the ground of being."
The enlightened teacher J. Krishnamurti used the term "choiceless awareness" to describe his own meditation method. This means being conscious without the thought process choosing something smaller than your vast fundamental being to focus on. Consciousness is like a glass ball floating in the depth of space. Light and sensory input flows into the field of consciousness from all directions. When you think, you focus your attention on just one area of sensory input or you create a thought from memory stored within the brain. With choiceless awareness you are not thinking or remembering, just floating and letting sensory input flow through you from all directions without manipulating that input with the thought process. You live in the moment and become totally open.
Krishnamurti's choiceless awareness is the same "methodless method" that Zen monks call "mindfulness." Hindu yogis sometimes call it "one pointed vision." A more accurate term might be one object vision. This means that you observe yourself, the sky, the trees, and the entire universe as one object. You no longer see the world as a multitude of parts and disconnected events. Instead, you accurately perceive the observer and the observed as exactly the same thing, with no artificial wall of separation blocking the limits of consciousness. This singular entity becomes acutely aware of itself in all its vastness. The one cosmic being, as Krishnamurti said, is "beyond time" and is "untouched by thought." The revered sage Ramana Maharshi described it as "infinite" and "bigger than the human race."