An Amulet of Talos will reduce the time between shouts by 20%. I believe this stacks with the +20% to shout recovery from shrines to Talos, which will knock a whopping 40% off your recovery time.

Sadly, you cannot disenchant the amulet and learn to make your own +Shout Recovery items.

Also the dragon mask Morokei add another 20% getting you to 60%