Keep your eyes on his chest and watch his movements, if you do things right you can determine what hes going to do and move accordingly. Keep dodging until hes tired out then just start pounding your fist into his gut or face.

For taking punches, simply try getting a friend to repeatedly hit you in the spots you're worried about (except for your nads, you'll probably just suffer) keep it up until his hardest hit doesn't hurt.

__________________
"My views on humanity? It is a disease, something that cannot be taught through a gentle push. No... We cannot be saved, our greed, our passion and our lust for knowledge has destroyed that which we have held dear. Humanity is below this world, my friend."

http://www.arg.com/hangout/7810-gene...-not-fail.html
For those who see flaws in our earth, discuss how and what you would change here.
http://www.arg.com/group.php?groupid=70
http://www.youtube.com/watch?v=xlULgi92zK8