But isn't that also suspect "I think, therefore I am". I mean is it really us that does the thinking? I wouldn't call it meditation because meditation literally means to think, but I do practice presence, becoming directly aware of the present moment and not thinking so much about past and future, and the more I practice presence the more often I catch my ego, the thinker, doing its own thing without my own volition. Have you ever separated awareness from thought Heisenberg? Have you ever just watched the thinker inside your head without volition or judgment? I've come to realize that much of the activity of my mind is completely out of my control, I honestly don't believe in free will, what are your thoughts about free will?
"I think, therefore I am" is the only thing we should accept without skepticism, because to do otherwise is not much different than non-existence. Is it us doing the thinking? We'll, yes, but the "us" is largely an illusion. But again, how else would we experience reality and gain something from it? This is how our brains have figured out how to connect with the world rather than merely exist in it like a plant. It creates illusions, even delusions, and fools us at nearly every step and turn, but in doing so, it allows us to make something useful out of the noise.
It's curious that you point out that meditation means "to think." Your are correct, of course, but the irony had never struck me before. Mindfulness meditation is what you have described. It's about observing the self. Disconnecting as a means of becoming more connected. I have used headspace for more than a year, though I will be switching to Sam Harris's app when it comes out.
Free will is a subject I haven't finished wrestling with. Everything I know about the brain tells me that free will is just another mind trick. I tend to agree with many of the arguments of Harris and Robert Sapolsky, who argue that free will is an illusion (more specifically, for incompatibilist determinism). However, Daniel Dennent cautions us that what we consider free will isn't even worthy of the title (because it doesn't exist) but that there is something else in us, that does exist, and we should call that thing free will.
I suppose I learn towards Dennent, because ultimately I feel it doesn't matter, and I'm not sure it's entirely worthwhile to sort it out. Free will may be an illusion, but it's my illusion, unique to me, probably never created before, and possibly never to be recreated again. My choices may amount to the results of the mechanics of a universe governed by cause and effect, but they have my flavor, were calculated by my internal processes, and come from someone that could only be me.