Book/do excursions independently! Some good info here for exploring ports on your own -
https://www.tomsportguides.com/mediterranean-cruises.html. Guided walking tours are also excellent. Don't try to do too much...relax and enjoy!
This is good advice. Cruise companies market their heavily marked-up excursions by saying you could miss the ship (because they claim they will hold the ship if you are on their excursion, but not on a private one). It is true and people do miss the ship from time to time, but the risk is low if you go with a reputable company and plan to get back with extra time to spare (two hours is what I prefer, but that can vary based on how far you travel from the ship). Even coming back early, you will save significant time compared to the Disney excursions, which can require meeting on the ship, being escorted off, held somewhere again, then boarding transportation. The whole process can take a lot of the day (for beach excursions we have done through Disney, we have never had more than a few hours on the actual beach). With a private excursion, sometimes you get off, meet your guide, and are on your way while people are still waiting for Disney on the ship (in tender ports, this isn't usually the case, as Disney tender's their excursions first). So not only do you get your private excursion, but you pay much less. I used to be a cruise-company-only excursion person, but after a couple of cruises I realized that was a mistake. Now I look at both private and Disney offered and pick the best options at each port.
Other tips:
Get travel insurance from a company other than Disney and be aware there are time limits on when you must get it after you make your first deposit. There are several websites that let you compare prices. Make sure you read the policies and know what you are getting. Travel insurance is mostly beneficial for medical issues that could arise that could cost tens of thousands of dollars or more in the cruise setting. But it can also cover things like missing the cruise, lost luggage, needing to cancel for work, etc., depending on the policy. I personally prefer higher-deductible options to save money, as I am really only buying it to minimize catastrophic risk and not replace $500 worth of lost clothes. I will take that risk myself.
Look at main and late seating for dinner and decide which one works best for you. Some people prefer late for mediterranean cruises, since dinner can be before all-aboard time. But, if you want to see the Disney entertainment, shows will be before late dinner anyway, so it won't help much in that case. You probably defaulted to late dining when your reservation was made. If you want early dining, get on the waitlist now by contacting your
travel agent or Disney. There is a very good chance of getting moved to main if that is what you want.
Don't pack too much. You won't need as much clothing and junk as you think. Nearly everything you need will be available on the ship and laundry can be done on the ship for a small fee.
Rick Steve's has a good Europe cruising book.
Enjoy! Disney Cruising is my all time favorite vacation option. We are doing our first Mediterranean
Disney Cruise next June.