Have you ever wondered why meditative techniques such as Zen and other "blank slate" inducers work to focus the mind?
Very simple when you focus on nothing, the only thing you have is what's already with you -- inside you, bothering you, burdening you, irritating and hurting you.
The blank slate tempts it forth, according to the laws of the physical world. It has been observed that matter tends to fill up and occupy empty space, and there is a perpetual resistance to vacuum.
So, the internal thought-matter comes out, slithers out, crawls out, to fill the vacuum of the blank slate imposed like a drainage catheter upon your busy mind, to fill the surface consciousness.
Use it to its full capacity.