Meditation - Just a state of mind

Do we need to sit a certain way or achieve some unknown silence in order to meditate? Think something in particular? Or nothing at all? What is meditation exactly?
Meditation is the state of mind when the mind is at absolute peace. When the mind is at peace, it is not involved in love, regret, obsession and the like. Is only is. When you try to attain something, your mind starts to wander about somewhere else. When you do not try to attain anything, you have your own body and mind right here. That state, is meditation.
A Zen master would say, "Kill the Buddha!" Kill the Buddha if the Buddha exists somewhere else. Kill the Buddha, because you should resume your own Buddha nature."