Shelves are much more satisfying than toy boxes.
Having order in the environment creates a feeling of security in the child, and trust in the environment. Baskets, trays, or small boxes neatly arranged on low shelves can be very helpful in creating this order. If the adult carefully and continually puts the pieces of puzzles or toys back in the basket in front of the child, she will eventually imitate and join in the activity. If you watch a child you will see which toys he plays with most and which ones just get dropped and forgotten. Try to keep only as many toys available to the child as can be kept neat, and uncrowded, in baskets on a shelf.