At the risk of sounding like those magazines that Viz used to take the mickey out of, I've had a good idea.
You know those annoying red rubber bands the postie leaves all over the front path? I've started picking them up and using them to keep Boy Three's small outfits together.
Hey Presto - recycling, tidying up and drawer organising all in one!
PS The added bonus is that the rolled up and rubber-banded outfits no longer look like I didn't bother ironing them. Result.