A common suggestion for making butter easier to spread is to use a grater to shred it -but that's kind of a pain in the butt. Now there is a real alternative though, the ButterUp. This clever creation allows you to shred your butter with the same knife you use to cut your bread and spread the butter. Best of all, it's easy to cleean, unlike a lot of cheese graters.
Read more about the ButterUp, including where you can buy one at Homes and Hues: The Ultimate Butter-Spreading Knife