How can I strengthen my body?

About myself:

Basically I want to become a good fighter. I have achieved my black belt in Tae Kwon do and am currently taking Judo and Kick Boxing classes.

I workout with this six days a week for muscle mass, strength and cardio:

http://fitness.scoobysworkshop.com/schedintermediate.htm

My question:

How can i condition my shins, AND other bones like in this video?

http://au.youtube.com/watch?v=y2vAHD5VmCo

And how can I get used to taking hits like in this video?

http://au.youtube.com/watch?v=j5c3TM_nu3k&feature=related

(It’s at 2minutes, 40seconds)

Also, are there any cons from shin conditioning and what they do in the second video?

train with heavier partners for body strength, kicking the heavy bag hard with shins will condition them, medicine ball workout for body conditioning.