This tip is so simple you won't get it if you don't understand it.
Put your things where you expect to find it.I do this by categorizing the object and putting all the items of that category in one place. For example books or clothes. But this tip is not complete without the following tip.
Be mindful when putting your things.What this means is that you have to be always aware of your actions when handling objects. When you don't need the object that you have in your hand go and put it at the place where you expect to find it.