If possible, you should skip sleep for the week. There is a lot of really fun activities going on all day (well maybe not from 2am to 7am).
Things that I think are "not to miss"
>The shows in the Walt Disney Theater
>The "cabarette" shows that are between the dinner seating times (family) and the "adults only" show at about 10:15 or 10:30.
>Dinners in the dinning rooms - make that your family get to gether time
>Art of Entertaining: the cooking demos, towel and napkin folding, galley tour, Ice sculpture carving demo.
>The Navigator series about the making of the Magic and other interesting topics
>Relaxing (ok, when is there time for that

) on the comfy blue loungers on deck 4
>Sail away parties
>The game shows: Walk the Plank, Mickey Mania in Studio Sea
>Don't miss getting off of the ship in each port and walking around a little - so that at least you can say that you've been there.
>Tip your waitstaff and room steward - they've been working hard for you all week
>Take the stairs not the lifts (elevators). The lifts are mostly for decoration (and the unsupervised kids use them as a "ride"). The stairways have Disney art in them. Each stairway has something different. You can usually get to the deck you want faster by using the stairs. An added benefit - you will have more room for desserts if you take the stairs.
>Enjoy the desserts - they are nummy!
>Be adventurous with your dinner selections. Be brave, try something you've never tried before (I found a couple of fish dishes that were wonderful - and I
don't like fish at all! If you don't like your first choice, your server will bring you a second (or third if necessary). You wouldn't do that at a nice restaurant at home - it would cost to much.
>Play ping pong on deck 9 while the ship is sailing - its do-able but challenging.