I practice Zazen (Zen sitting meditation)
It involves not-thinking and not-focusing.
One empties the mind of thought (easier said than done).
This is not the same thing as focusing on "nothing".
One way to do this is by counting one's breaths... Breathe in Breathe out 1. Breathe in...breathe out 2 up until ten and then start over. If the mind begins to drift simply bring its focus back to breath. It is important not to fight when your mind drifts, just slowly bring its focus back.
The state of mind that one desires to achieve with Zazen is that of complete awareness. Living every moment.
The whole idea is to let the mind sit in its natural state of awareness.
My avatar is from the cover of the book "Satori in Paris" by Jack Kerouac.
He is one of my favorite authors. Satori is the japanese word for the enlightenment attained at the height of Zen practice.
I chose the avatar because I am in love with Paris (I lived there for 6 months last year), I dig Kerouac, and I dig Zen (of which kerouac was a practitioner).
I currently meditate a couple times a day for 15-45 min. I find that it really helps relieve stress.