If you're willing to give up some of the closet space, I had used a hanging shelf organizer. Gives you about 6 extra shelves (also available at target). I threw loose stuff and bathing suits, bras and socks in it.
We take wire hangers (shirt and pant) so we can hang all shirts, pants, shorts, etc. and then we leave the hangers at the end of the cruise
I like the suction cup idea. I need to get one of those. I checked out those packing cubes available at the Container Store yesterday. Not sure that I would be disciplined to learn to fold my clothes in a new way.
I use the cubes all through the cruise to keep socks, undergarments, belts, etc, etc, etc, in. That way all this little stuff can be stored under the bed in bags or piled on top of each other in the DCL foot locker
I just need to learn to get by with less shoes on the cruise!
Laundry: I bought those sheets that have detergent, fabric softener and dryer sheet all in one (Awesome!) DO NOT bring quarters. You can only use your KTTW card for the laundry. Think it was $2 wash or dry. I did take advantage of the press only feature from DCL. It was $2.25 to press a pair of pants. I'll definitely do that again on this trip.
Cannot believe the volcano effects. The pictures were amazing, though! Not going to worry about that for 4 weeks or so. That should settle out.