I belong to a music-related online message board, and for a period of time (until Spotify came along) we had a mixed CD exchange at Christmas time. Each participating member was paired with a secret recipient.
After the recipient received his or her mix, we would offer up the mix to anyone else who wanted one. Many of us, myself included, had fun with themes and custom covers. Many of us would often make more than one mix each year. The time and postage invested was more than worth the piles of new music we would receive in return.
2005 was my first year participating in this mixed CD exchange. I included both discs on one cover, which was folded at the middle and opened top-to-bottom.
Process: Adobe Photoshop
Output: Full color digital printing on 80# glossy coated paper