What research have you done?
How important is having a choice of restaurants, entertainment, and/or shopping within walking distance? Or do you want your resort to be secluded?
How important is proximity to a beach and to a swimming beach?
Choosing a hotel across the street from the beach, or a short drive away, may save a lot of money. Another thing to be aware of is that not all hotels on the water really have beaches. Some beaches — especially in Kauai, with a potentially strong undertow — are not good for swimming.
How important is the pool?
Some hotels with great beaches have pools that might be reminiscent of one at a mediocre club in the Midwest (albeit usually with better scenery). Others are mini waterparks, with everything in between. For that matter, some, but not all, hotels have separate adult and kiddie pools. Pick what you need for your perfect Hawaiian vacation.
How much does the room itself matter?
Are you looking for more of a basic room or condo to save money or something newer and updated that might cost more?
How important is the view for your perfect Hawaiian vacation?
City or Mountain views can be quite a bit less than an ocean view. A great view may be worth the price to some and for others it is not a big deal.