Go to Waikiki beach if you feel like checking out hot bitches. If you feel like swimming, check out these lagoons.
http://www.hawaiiweb.com/oahu/beache...na_lagoons.htm
Also you can hike in Diamond Head. You can check out Pearl Habor and shit but i felt like they are ripped off. The chinatown is lame as shit. My parent went there to buy rice during our vacation lol. no joke.
There are shrimp trucks along the North coast. My sister picked up some and they are rocked your mouth.
http://www.hawaiiforvisitors.com/oah...imp-trucks.htm
Rent your own car and drive around. They are fun.