Go to a relatively non-urbanized location. If you are in India and you are reading this, you are likely to be in a city, which would approximately be about 50 km from the ideal location for this. Between 9 pm and 4 am, go to an clearing -- a huge lawn, a playground, a football ground, etc. Go to it's center. Lie down on your back. Stare up. At the sky. Look at the stars, planets, and other celestial objects. Now, imagine this. You are lying on the surface of a miniscule lump of rock, with approximately 30% of the universe in your field of vision.
The sheer vastness of the universe vs. the relative insignicance of the planet, the continent, the country, the state, the region, the locality, and you.
The easiest way to recalibrate your brain. Ever.