“Vipassana” is a Pali word thaTypes of meditation - Vipassanat means “insight” or “clear seeing”. It is a traditional Buddhist practice, dating back to 6th century BC. Vipassana-meditation, as taught in the last few decades, comes from the Theravada Buddhist tradition, and was popularized by  S. N. Goenka and the Vipassana movement.

Due to the popularity of Vipassanā-meditation, the “mindfulness of breathing” has gained further popularity in the West as “mindfulness”.
 
How to do it
[There is some conflicting information on how to practice Vipassana. In general, however, most teachers emphasize  starting with mindfulness of breath in the first stages, to stabilize the mind and achieve “access concentration.” This is more like focused attention meditation. Then the practice moves on to developing “clear insight” on the bodily sensations and mental phenomena, observing them moment by moment and not clinging to any. Here goes an introduction, aimed for beginners. To know more I’d suggest following up the links provided or learning from a teacher (perhaps in a Vipassana retreat).]

Ideally, one is to sit on a cushion on the floor, cross-legged, with your spine erect; alternatively, a chair may be used, but the back should not be supported.

The first aspect is to develop concentration, through samatha practice. This is typically done through breathing awareness.

Focus all your attention, from moment to moment, on the movement of your breath. Notice the subtle sensations of the movement of the abdomen rising and falling. Alternatively, one can focus on the sensation of the air passing through the nostrils and touching the upper lips skin – though this requires a bit more practice, and is more advanced.

As you focus on the breath, you will notice that other perceptions and sensations continue to appear: sounds, feelings in the body, emotions, etc. Simply notice these phenomena as they emerge in the field of awareness, and then return to the sensation of breathing. The attention is kept in the object of concentration (the breathing), while these other thoughts or sensations are there simply as “background noise”.

The object that is the focus of the practice (for instance, the movement of the abdomen) is called the “primary object”. And a “secondary object” is anything else that arises in your field of perception – either through your five senses (sound, smell, itchiness in the body, etc.) or through the mind (thought, memory, feeling, etc.). If a secondary object hooks your attention and pulls it away, or if it causes desire or aversion to appear, you should focus on the secondary object for a moment or two, labeling it with a mental note, like “thinking”,  “memory”, “hearing”, “desiring”. This practice is often called “noting”.

A mental note identifies an object in general but not in detail. When you’re aware of a sound, for example, label it “hearing” instead of “motorcycle,” “voices” or “barking dog.” If an unpleasant sensation arises, note “pain” or “feeling” instead of “knee pain” or “my back pain.” Then return your attention to the primary meditation object. When aware of a fragrance, say the mental note “smelling” for a moment or two. You don’t have to identify the scent.

When one has thus gained “access concentration”, the attention is then turned to the object of practice, which is normally thought or bodily sensations. One observes the objects of awareness without attachment, letting thoughts and sensations arise and pass away of their own accord. Mental labeling (explained above) is often use as a way to prevent you from being carried away by thoughts, and keep you in more objectively noticing them.

As a result one develops the clear seeing that the observed phenomena is pervaded by the three “marks of existence”: impermanence (annica), insatisfactoriness (dukkha) and emptiness of self (annata). As a result, equanimity, peace and inner freedom is developed in relation to these inputs.

Information Source: http://liveanddare.com