The mind must be left alone, as water also would, with an interval of acceptance as its motion steadies, before it settles and can become still.
All too often we want stillness now. It only requires a slightly wider scope of patience and the stillness will happen to you in just a few moments more. It cannot be implied nor regulated in any one moment. Meditation is not control nor concentration. It is passiveness.
Leave it be and stillness will come to you.
Stillness is mindfulness and mindfulness is energy. This breeds the clarity we need to approach life with peace, tranquility and the understanding of ourselves, each other and of all beings.
It is in our interests to leave our minds to settle under the properties of its own nature for the forthcoming of our capacity to think, feel, love and live.