Alrighty... excercising ya Chi/Qi/Ki....

You've been getting good stuff so far - some other bits to add:
The breath - a lot of the sitting Qigong that I learned (read=self-guided meditation) dealt with breath.
You follow the breath in and out of the body - count the breath until ten, then start over.
You can also concentrate on the tan tien - the whole idea is to cultivate Qi and your awareness of it.

Sitting postures need to be correctly aligned so that the Qi does not get constricted - like what Werdlicious said. Having a teacher is very important - so that you don't get into bad habits - or worse yet - do something that can lead to harm.

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"Learning is for seeking the Way; what is the use of learning otherwise?" - Master Zhu

I totally agree with that you need to have a teacher for these things. While the breathing itself is not bad for you. Your mind is and extremely powerful tool and can actually cause physical changes depending on what you are concentrating on. I know that sounds flakey and new agey but it's true.

Also what are you looking to gain from the practice? Intent as it were is very important when doing this. As in anything you need to know what you are seeking before you try to find it.

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"Keep the gun oiled and the temple clean"

and to think that einstein only unlocked 10% of his brain potential.

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I Know Kung Fu

“	Originally Posted By: buddha28 and to think that einstein only unlocked 10% of his brain potential.	”

Sigh.
That is a myth.
http://www.csicop.org/si/9903/ten-percent-myth.html

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"Learning is for seeking the Way; what is the use of learning otherwise?" - Master Zhu

“	Originally Posted By: n1ckmeyer Sigh. That is a myth. http://www.csicop.org/si/9903/ten-percent-myth.html	”

You took the words right out of my fingers..........*Reiterates n1ckmeyers sigh*

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"-when you yourself know that a thing is good, that it is not blamable, that it is praised by the wise and when practiced and observed that it leads to happiness, then follow that thing.”

ok calm down.

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I Know Kung Fu

I think your underlying point is that humans do not begin to tap their potential. On that point I'll agree 100%.

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"Learning is for seeking the Way; what is the use of learning otherwise?" - Master Zhu

Right, I think how it is, is that we use every part of our brain, just not 100% of these parts.

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"-when you yourself know that a thing is good, that it is not blamable, that it is praised by the wise and when practiced and observed that it leads to happiness, then follow that thing.”

we do use 100% of the brain BUT have failed to unlock the whole potential of the brain.

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I Know Kung Fu