Bhagavan Sri Ramana Maharshi
When I say, ‘Meditate on the Self’ I am asking you to be the Self, not think about it. Be aware of what remains when thoughts stop. Be aware of the consciousness that is the origin of all your thoughts. Be that consciousness. Feel that this is what you really are. If you do this you are meditating on the Self.
But if you cannot stabilise in that consciousness because your vasanas are too strong and too active, it is beneficial to hold onto the thought, ‘I am the Self; I am everything.’ If you meditate in this way you will not be cooperating with the vasanas that are blocking your Self-awareness. If you don’t cooperate with them, sooner or later they are bound to leave you.
If this method doesn’t appeal to you, then just watch the mind with full attention. Whenever the mind wanders, become aware of it. See how thoughts connect with each other and watch how this ghost called mind catches hold of all your thoughts, saying, ‘This is my thought.‘
Watch the ways of the mind without identifying with them in any way. If you give your mind your full, detached attention, you begin to understand the futility of all mental activities. Watch the mind wandering here and there, seeking out useless and unnecessary things or ideas, which will ultimately only create misery for itself.
Watching the mind gives us a knowledge of its inner processes. It gives us an incentive to stay detached from all our thoughts. Ultimately, if we try hard enough, it gives us the ability to remain as consciousness, unaffected by transient thoughts.
Excerpt from: Living by the Words of Bhagavan by David Godman