Well you will have a wonderful time! Haven't been back for awhile, but I always loved snorkeling at Hanama Bay (sp?) and visiting the Pali lookout and the Polynesian Culture center, and the beaches on the north side with their huge waves. You used to be able to board a city bus right downtown Honolulu & ride around the complete Island for a very reasonable price. You might enjoy doing that at the beginning to just see a little of what's available. And of course hike up into Diamond Head, and go to a special Hawaiian evening with the pork etc. can't remember how to spell it (luah?) I know alot of these things are touristy.... but they're fun to do at least once.