We just went in June to some of the places you mentioned. As another poster mentioned, look up exact addresses and print out a map with the routes ahead of time, this came in handy.
One day, We went to the Polynesian Cultural Center up near North Shore, and on the way there, stopped at the Dole Plantation. We walked around their gardens (free) and got a Dole Whip in the large shop, did not do the maze on the advice of many people on this forum.
We drove along the North Shore on our way to the Polynesian Cultural Center and stopped to eat in Haleiwa Town at Waialua Bakery. This town also has the famous Matsumotos shave ice place, but there was a long line for that and we had just eaten, so did not do it. When we came through later, it was closed.
We enjoyed the Polynesian Cultural Center and wish we had purchased the ticket that includes the luau, as we were hungry at closing time and there wasn't really a good food option nearby. A great tip I read was "bring a hat" and boy was I glad I had mine! The PCC is pricey, but we were glad we went. It's not something I'd do on every trip though. We stayed until closing time.
From there we drove to Turtle Bay, which is a well known resort hotel with great sunsets. They have bleachers set up for viewing, which we barely arrived for. We drove back to Ko Olina in the dark. I wouldn't want to do that by myself, but with my DH was fine.
I agree that Kuoloa Ranch looked interesting, but it was even farther than our North Shore day and we didn't want to drive back up that way again. It would probably take up a whole day by itself.
You can get free tickets to Pearl Harbor, you don't need to pay for them. Reserve them on the government national parks website now before you go. It is like $1.50 to do this ahead of time. We didn't get ours early enough and had to stand in line with hundreds of people at 6:00 in the morning to get ours. Pearl Harbor is very close to the Aloha Stadium Swap Meet which I believe is on Wednesdays and the weekend. Best souvenirs, hands down. Great prices, fresh fruit, etc. Must go! This is all great to do on a Waikiki day if you are condensing travel. We went out on a catamaran from behind the Sheraton Waikiki, and they also have Dole Whip at Pete's coffee at the back of the resort. I got my catamaran ticket so for a great price on Travelzoo.com before our trip.
Have a great time!