And just because you think you've put enough on.... you haven't. Put more on and more frequently.
I burned under my bathing suit straps and was in pain wearing a bra for 3 days.
Oh yeah, bring some of that aloe and lanolin stuff for cooling off a burn.
My other tip is don't leave your "must dos" to the end of the cruise. Time flies on the ship. First it's breakfast, then next thing you know it's lunch and then a few hours later it's supper. If going on the Aquaduck is a priority, do it. Make time for it. If playing mini golf with the kids is a priority, make a date for it. Next thing you know, it'll be
Castaway Cay day and you've missed half the things you thought you'd do. You've still had fun, but missed things you wanted.
Oh yeah, even if you're SURE you're one and done,
buy the placeholder! You can always cancel it later and it's only good for 2 years before you get your money back, so it's a no lose deal (unless you can't afford it, of course).