Many years ago there was a book, Java Modeling in Color with UML, which event gave you a reason to purchase the nice red/blue/green/yellow packs of index cards.

Many years ago there was a book, Java Modeling in Color with UML, which event gave you a reason to purchase the nice red/blue/green/yellow packs of index cards. I found it a very nice way of decomposing a problem (into entities, roles/interfaces, temporal things and description/lookup tables), but I've not seen anything like it survive.