Sit down and walk through each day of your vacation. That will help you remember stuff...example....
Flying out of here, how are we getting to airport, ok, covered. then we get on flight at this time, land this time, get a cab? go to hotel. Yup, got hotel booked, get up next morning. have breakfast here, cab to port, get on ship. Oh, need passport! etc. etc. etc.
If you visualize your entire trip like that, every single step, it should help you remember 95% of everything you need. Plus there are a few threads here about, little extra things to bring on your cruise like Duct Tape