I guess mind by nature is hyperactive. Awareness of the mind and its perpetual motion will only bring about calmness. Maybe dissatisfaction is also a reason for boredom.
I think, mostly what we do in life, we do, to get rid of boredom. We like to fill up all our time except when we are asleep, with some activity and would never l;ike to be not doing something, physical or mental. This is because of our conditioning. Idleness, mental and physical is taboo.
However it is essential that we come to terms with boredom. Boredom if understood, not pushed away can be liberating. Boredom without guilt is probably the only way we can relax.
On Mar 25, 2014 arun wrote on Are You Bored Yet?, by Karen Maezen Miller:
We are gifts to each other, we are gifts to ourselves. Is there really the other? Are all of us really separate? Physically, mentally to some extent, but spiritually there is only one. Let us move out of me and mine and there is the whole world. Boredom does not exist when you embrace this universe, you have so much to do for so many.