-Rent a car and travel to the North Shore: this was our favorite activity. Fun way to see the island. We drove up the to the North shore by taking the east side of the island highway. Highly recommend it, all coastal views. (see above for our North Shore Recommendations)
-Snorkel Tour
-Charter a boat and sail around the island
-Explore the Beaches: my short list:
(Sunset Beach, Lanikai Beach, Kailua Beach Park, WiakikiBeach)
-Attend a Luau: the kids LOVED it!
-Shop in Honolulu: really good high end shopping.