If you are about to put things in storage for a long time, or if your short-term storage solution has suddenly stretched out over several months and shows no sign of ending, you need to make some specific moves to keep your belongings safe. The biggest move is to ensure your belongings are in a reputable storage facility -- that goes a long, long way toward keeping your belongings safe. Still, there are things that even the best facility can't control, so take a few more steps to keep your stuff safe.
If you are planning on taking a long trip and want to store your personal belongings for the time being, you might want to consider getting a storage unit. However, the last thing that you want is for you to come back from your amazing trip only to find that your personal belongings have been damaged due to the way that you stored them. You also don't want to pay for heated storage if you don't have to.