Learn to value whatever you have. Even if you can get/buy a replacement, try to see if what you currently have can still serve its purpose efficiently. Not only is it practical, it also teaches you the key to real happiness — contentment.
“Happiness is not a matter of good fortune or worldly possessions. It’s a mental attitude. It comes from appreciating what we have, instead of being miserable about what we don’t have. It’s so simple yet so hard for the human mind to comprehend.” — Bits and Pieces