Normally, I recommend storing everything you own in containers out of sight, but even I can acknowledge that that has some limits. First, tucking everything away may not align with your unique cleaning style. Second, life is just more complicated than that; you probably have miscellaneous items that you struggle to store within those guidelines. That's why you need a tray of some kind in every room to catch the little things that don't quite fit anywhere else or are too frequently used to justify putting away.