For the pawing issue, it could be frustration/boredom, so keep him occupied, like Jazzy said, do different things with him. If he still does it, put your foot against his leg (don't kick!) so you block him, and say "no!" in a firm voice. As soon as he stops, praise him. Or you could try and bottle or can with stones/gravel in it and as soon as he starts pawing shake the bottle and say "No!" again in a firm voice! As soon as he stops, praise him lots, give him loads of rubs and scratches. I don't believe in hitting any horse in any way and i've heard these methods work very well :)
As for the saddling/girthing problem, I would get him checked by a vet, something might be hurting him. If that's all ok, he could just be a very ticklish Thoroughbred, so don't punish him for that. I know one TB who is so ticklish, puts his ears back for everything saddling, grooming, putting on/taking off rugs.
Hope this helps :)