Excellent tips! Especially the one with tips on filing out of area insurance claims...that will be helpful to many I'm sure.
Ditto to all those that say to fly in a day early! It makes a much more relaxing start to the cruise!
Be sure to pack your documents in your carryon or purse and keep it with you (not in the trunk of the taxi).
If you do need to pack liquids (hypoallergenic laundry soap for me), you can get leakproof bottles from www.containerstore.com
Be flexible with your plans. There are occasions that ports change or are missed.
Relax and enjoy!