Purchase containers designed for storing CDs and DVDs. This will make it easier for you to keep track of your collections, because each CD and each DVD will have a specific place.
Keep your CD and DVD collections in alphabetical order. This will help you easily see when one is missing.
Make a list of all the CDs and DVDs you own. Keep this list as a file on your computer, so you can update it easily.
Keep your CDs and DVDs in the area of your home where you use them most often. For example, you might keep your DVDs near your living room TV and your CDs near your bedroom CD player. Consider purchasing adjustable shelves so you can continue to add to your collection.
Get rid of CDs and DVDs you no longer want. Keeping a smaller collection will make it easier to keep track of the items you have.