I also like the Liquid hand soap so I bring a 1/4 full bottle of foaming soft soap
I bring collapsible "boxes" from the Dollar Store ... usually 4 of them ... a 9x11 inch to keep on the coffee table to collect papers in, then 9x9 inch ones to keep on the desk, the bedside table and in the BR to collect odds and ends so the cabin is neater.
I pick up some kind of decorative garland at the Dollar Store to put around the mirror with the magnetic hooks. I bring 4-6 magnetic hooks
I bring note paper or a small whiteboard and "pen" to leave notes for husband
I bring 8 clothes pins to hand things on the clothes line in the shower
I bring 6-8 thin "velvet" hangers ... I like to hang up most of my things
I bring earplugs to wear at night ... I like it very quiet
I buy bags of individually wrapped Life Saver mints and give each room steward a bag in the beginning of the trip ....we have always had 2 attending to our cabin, and I bring Merci chocolates to give them plus extra tip at the end of our cruise (in addition to the paid gratuities for the crew).