We just returned from 11 days at Aulani. Here's a random list of some of my favorites.
North Shore: Giovanni's Shrimp truck, Woody's corn on the cob and Ted's bakery (loved the mini chocolate chip macadamian nut cookies)
Matsumoto's shaved ice, too.
We ate appetizers for dinner off The Olelo Room menu while listening to the live music. Loved the nightly live music in a beautiful setting! Ama Ama was our favorite on-site restaurant for a nice sit down meal.
Try a Tropical Ginger Lemonade if you've never had one. YUM!
The Swap meet at Aloha Stadium is every Saturday, Sunday and Wednesday. It's a great place to shop for souvenirs including locally made items.
Electric Beach is a great place to snorkel. The power from the electric company heats the water offshore and attracts all types of fish, eels, sea turtles, etc . . .
Spend an afternoon at the spa and relax in the hydrotherapy garden. Heaven!
Food:
Ko'Olina BBQ across the street from Aulani was good. We liked the BBQ chicken best.
ABC market had good panini sandwiches and other easy lunch options. Portions were large so we shared.
Just Tacos-- food was not great (I'm from Texas so it takes good Mexican food to impress me) but their tequila selection was extensive and the margaritas are worth a try.
Roy's-- good fixed price option
Brick Oven Pizza in Kapolei
Safeway in Kapolei was super expensive ($7 for a box of cereal).
Walmart has better prices for basic grocery items. Buy what you can there then splurge on the other stuff at Safeway.
If you geocache, take time to geocache in Oahu. There are some amazing places to discover.
Aloha!