Here are a few things I've discovered that I will always have with me on a cruise from now on....
This is a float that's easy to blow up and easy to fold back up to make packing easy. I loved having this to relax at half moon.
https://amzn.to/3IkYjc0
Packing cubes. Helps me keep my bags more organized.
https://amzn.to/3P5vWm5
Waterproof phone pouch..
https://amzn.to/3Tj2HyF
Pop up tent. If you have kids this is nice to get a little shade on the beach while resting. There is a video posted in reviews on how to fold back up....just practice you'll get it lol
https://amzn.to/49Dlhay
Power strip...non surge protected. Must have for more charging ports!!
https://amzn.to/3T2Cinc
luggage tags and lanyards. don't have to worry about your luggage tag being ripped off while being thrown around in route to your room. And the lanyard to hold your cards.
https://amzn.to/3IiurwO
I've been on 4 cruises and still learning as I go but this is just a few goodies I'd recommend.
I do get a kickback from any purchases made from these links, but I have these things and have personally tested and do recommend.