I have a CD collection of around 500 albums. They are placed alphabetically by artist on around 10 shelves (shelves are vertically aligned one above the other, and are bounded on the sides). The first CD is on the top shelf in the leftmost position. The next CD is to the right of it. When a shelf is filled, the next CD goes on shelf below, again on the left. A nice and simple solution. Everything is already sorted, and I can find a specific CD really quickly this way.
The problem is that when I buy a new CD, I need to stick it in its correct alphabetical position. To make room for it (as the shelf is already full), I need to remove the rightmost CD from the shelf, and move that removed CD to the leftmost position in the next shelf. As there is no room either, I need to repeat this process shelf by shelf until I get to the bottom. Effectively shifting around tens or hundreds of CDs each time I need to insert a single one!
This is really annoying me. One solution I've tried was to leave an empty space of around 5-10 CDs in each shelf. Things got better, however it is only a temporary solution. Soon enough these gaps got filled again and I am back to square one.
I wonder if there are any suggestions for getting around this problem permanently (and, no, starting to buy digital albums online isn't an acceptable answer :) )? Surely I'm not the first one having it.