Packing is pretty easy for us; we usually pack the night before and don't have much of a list. Although I sometimes bring a laptop, I never bring a power strip. Since most of our cruises are to places other than Caribbean, we usually leave the snorkel gear at home. Over Christmas, we do bring a small tree. If a cruise has multiple formal nights, I will bring a separate cumberbund/tie for tuxedo for each formal night. If there are at least three formal nights, I will bring my dinner jacket also. Otherwise, nothing special.