Armatures and IK

Can anybody post a good tutorial on armatures because it is very difficult and I am diffidently struggling with it. The more help the better.

Maybe the following at the Blender Wiki for tutorials may be a good start …

Of the list found here :
the introductions to character animation and to rigging are about the best one can find.
If you want something better still, I can only recommend Bugman_2000 book: