How do you prevent things from getting lost at home?
You create a lost and found container. It can be a bin, drawer, shelf or pretty basket. Anytime you or someone in your home finds something left out, simply place it in the lost-and-found.
To make this successful make sure everyone knows where to look when they are missing something. Also, when the lost-and-found container becomes full, call a family meeting to clean it up. What ever is not claimed gets tossed or donated.
You can easily manage those things left lying around and clear visible clutter by implementing this system.