Meditation has to be a way of life. There is no beginning meditation and stopping meditation. Meditation should not be confined to a particular posture, a particular time because from the time that we wake up to the time we go to sleep our mind is moving, we are having thoughts, we are having states of mind. So ideally we should have this constant awareness, constant alertness, constant checking out what is happening in our mind throughout the day. Then meditation becomes a way of life. Life and meditation are not two things, they are just one.