How can an unsteady mind make itself steady? Of course it cannot. It is the nature of the mind to roam about. All you can do is to shift the focus of consciousness beyond the mind.
Sri Nisargadatta MaharajWatch your thoughts as you watch the street traffic. People come and go; you register without response. It may not be easy in the beginning, but with some practice you will find that your mind can function on many levels at the same time and you can be aware of them all.
Sri Nisargadatta Maharaj