Satipatthana is the most important thing.
It is the way of continuously practising and if you are practising really continuously there is no way you are not going to see the mind. Your sati and samadhi will be so strong that you are going to know that this is the mind; you need a lot more strength of mind to see citta than to observe rupa.
If you want to be very effective you have to practice really hard. The mind you see is very subtle and very fast. You really need to apply your self.
If the mind is really completely relaxed then the body will be relaxed too. If there is some tension in the body it means that the mind is not completely free of tension.
That is why you have to continue to watch what you can watch, that is, the tension in the body.
When the tension in the mind becomes completely zero all this will be very clear to you. (Zero is a balanced level where everything is nice and balanced and makes you feel very awake and light).
So remember, body relaxed, and mind relaxed — but alert!
First you have to ask the yogi to watch his mind or what does he feel in the mind. If he can feel the mind that is fine. So it is not so much to look but feel it and observe it like this.
Pay attention to the feeling rather and not the place (where one imagines the mind to be).
As a teacher you always have to separate the conceived reality from the absolute reality for the student. You always have to remind them that this part is concept, and that part is reality.
Ask the yogis: what is the mind doing now? Everyone can tell you what their mind is doing now. They know what the mind is doing but they can’t observe it. If you know what the mind is doing, you get to learn how to observe the mind. But it’s difficult to explain the whole thing, you have to let them practice, explain, practice, explain and so on.
The other thing is you have to tell them to make the sati-samadhi strong. How you do this? Continuous practice. You practice continuously, moment-to-moment awareness.

From – Buddhist Meditation – Contemplation of the Mind