You will find lots of helpful suggestions from your fellow cruisers if you sign up for the meet and mingle hosted by RCI. Go to royalcaribbean.co.uk >contact us> FAQs > and then under the On Board section it tells you how. You will have to register (it is free)
No shortcuts really just lots & lots research of the ship/dress code/ports of call/excursions either by yourself or through the ships tours/ i suggest that you use the search feature on the find a answer box on this site and spend a few days scrolling though the answers the more research that you do the more you will enjoy your Cruise it really is worth it for a good time.
This is too wide a question to be very specific but if there are 4 of you then plan to do your own excursions, expect inclement weather at that time of the year, even storms and if you have sea days mark your daily news sheet with the activities that you want to do on the ship so that you don't miss anything..... Neil.
Never mind about the weather as you will hardly be affected on a ship of this size in the Med. Rough weather is always welcome anyway as it keeps the old folk and the young children in their cabins and means that mealtimes can be much more liesurely and interesting. Pack a dressy outfit but there is really no need for Dinner suits on RCI ships. A lounge suit and tie 2 times a week and smart casual for the other evenings will see you through. The Berlitz guide to Mediteranean Ports of Call would be useful but google your ports of call and all will be revealed. EPHESUS is a must see place and RHODES is good to get around on foot. Excursions can be expensive but bar prices are reasonable. Try and get on a large table with your friends and you will hopefully get into some great company with your fellow diners. If you wish to change tables see the Maitre D on your first night and he should be able to sort it for you. Your advance information that will come with your tickets will give all the advice you need. The rest is up to you so read the daily programme which you will get the previous night and this will tell you all thats going on. Hope you enjoy it.
And then hopefully those up on deck during the rough weather will fall over board leaving the old folk and children to enjoy the rest of their cruise without the constant moaning.
If you google 'ports of call cruise boards' the first link should take you to a most excellent site full of info.