To remember Where are your things.
Take a photo of anything you need! It can be eather CD, DVD, or Ski for example. Then take a photo of the place where you put that thing (a garage, a storeroom or somewhere else) or a photo of a person who you gave it
to for some time (your friend, or your neighbor, or your colleague)!
Just drug a picture of your thing to the picture of
the place where it is.
From now on you always know What is Where!