One final note before we get started. This project does not require a tremendous amount of skill, though it would be very helpful to have experience with some woodworking beforehand, for obvious reasons.
Step 1: Got Wood?
Since this is a DVD case I opted to make it 8" wide for a good movie holder size and to save a little bit on costs. If you get the 10" , you will have more stackable configurations available to you, as you will be able to stack them perpendicularly as well. You still technically could, but it would have some overhang. So on with the materials.