I say to people,
"Sit quietly and watch where the mind goes."
If you observe it you will see that it is always running off to enjoy or suffer experiences that belong to the past.
whenever you catch it doing this,
bring it back to the present moment.
In this present moment there are no dialogues going on.
In this present moment there is nothing to control or repress.
The mind is just like a thief.
It is stealing your happiness by making you run after things and ideas that make you suffer all the time.
Bring it back to the present each and every time you find that it is wandering somewhere else.
This thief in your head loots your property, your happiness, every waking moment.
And you allow him.
You make friends with him and let him do what he wants.
Why should you fondle and be friends with a snake that is going to bite you and make you suffer?
Show the mind the way home and don't let it make you suffer all the time.
The internal dialogue will go on interminably until you decide to stop indulging in it.
This dialogue continues all day and even at night while you are dreaming.
If you are serious about stopping it,
by taking a firm decision and sticking to it.
"I am going to do it now. If not now, then during this life span."
If that intense determination is there, that determination itself will be enough to stop the flow.