How to quickly train Block in Skyrim?

My level 45 character has dragon armor but my Block skill is lagging behind (53 at the moment). How can I train it quickly?

Solution 1:

Get the very best shield you can (along with your best armor, etc). Don't forget enchantments. Block a hit from a giant. Heal. Repeat. :D

If you can suppress a dragon's breath weapon long enough to make him fight you in melee, blocking a strong dragon for a while will work too. The problem with using a dragon is that if you have a healing spell in your right hand, you're not hitting for magicka damage or with anti-magicka poison, so they'll eventually breath weapon you again. Giants are easier if you can survive a hit.

Either method is likely to train your Restoration too, assuming you're healing with spells and not potions.