When your child receives something new, they should have to give one of their old toys to a thrift store, or a friend. It keeps clutter down to a minimum. It also teaches them to not overdo it as they get older.
The outside of the refrigerator makes a great Bakugan play area. Bakugans stick to the refrigerator with their magnets. You can line them up, battle them, and make them climb up the refrigerator.
To organize my girls smaller toys, I filled see through bins with the toys, took a picture with my digital camera of one or two of the items that were inside (for example) jewelry or little people.