Okay, the year might be almost half over, but this is still a great idea. From Martha and her minions comes the CD Jewel Case Calendar. To make one, all you have to do is download the provided calendar, print it out on good quality 8 1/2" x 11" paper, cut out the months with a utility knife or paper cutter and then slip the sheets into a jewel case flipped inside out--meaning pop the front off, flip it around pop it back on. And now that we've all been inspired, we can design our own custom calendars for 2009! Via.