Any spot on Waikiki Beach is decent. You can walk along it to see what area you want to chill in. Definitely hit Diamond Head & Monoa Falls for sights/hikes. The food wasn't too amazing imo but they have some good Japanese restaurants. Marukame has some good *** udon noodles & sides, we hit this twice lol, and The Boiling Crab has great seafood boil. There's a few sneaker shops, but they're all consignment and the prices are OD, but I think Truest is the only one worth seeing. If I go back to HI I'd probably stay in Maui. Heard it's a lot less touristy and laid back. Check out the Kona farms where they brew the beers & coffee.