There is also the Amulet of Talos which you can wear, which reduces it by 20%. It's found on the body of Roggvir who is executed the first time you visit Solitude, but you might lose it due to a quest.
Another occasion where you might find this Amulet is when you exit Ironbind Barrow after clearing it, look around at the mountain peak. It should be lying around on a statue between two chests.