Here are the tips that have worked for me:
1) Over the door shoe hanger. Really helps to keep track of tolietries and other small objects.
2) Small travel light-up travel clock. If you are like me you might want to know what time it is in the middle of the night. I know they have clocks in the room, but I intend to bring my light up one.
Now a few tips on enjoying the cruise:
a) Read this site, as well as Barb & Dave's sites. They will give you a good idea of what is happening.
b) Now that you've done that figure out what you and your family want to do. The key here is try NOT to do EVERYTHING. Do things because you or your family want to - not because everyone says you should. Only you know what is right for you.
c)I set the money aside for the tips ahead of time and mark who they are for by position. You can, of course, charge your tips, but I prefer to pay in cash (and we usually include phone cards as well).
Well those are my tips, hope they are helpful. Happy Cruising!