First thing that comes to mind is the Pirate Cruise from 9:30 to 11:30 (certain days only) at the Grand Floridian. Of course, if you were planning to be in the parks every morning, you might want to pass on this.
When you are planning out your itinerary and PSs, have regard for which parks are open earlier or later for Disney resort guests so that you can take advantage of these early openings and late closings. Also, make sure you take into account when the parades and fireworks are at each of the parks so that you can plan to be there when they happen (parades - MK, AK, MGM, fireworks - MK (Wishes), Epcot (Illuminations), MGM (Fantasmic). If you'd like to see the Fantasmic show at MGM, consider making a PS for the Fantasmic dinner package which will give you a dinner at a sit down restaurant at MGM and a voucher for preferred seating at the Fantasmic show.
You can find more about all the above elsewhere on these boards by doing a search.
Good luck with your planning.