Suzanne,
I looked on line for cruise packing lists, then went through my "passporter" to see how many formal nights, pirate night, etc. then I tried to figure out how many basics, like shorts, tops, underwear, socks, swimsuits, etc. to bring. I have heard there is a laundry on board, too. which is good for me - I have a 9 year old son who uses his clothing as a napkin at times! Claire