Understandably, you're anxious to explore the possibilities of your Kauai adventure.This website and corresponding book are excellent!
KAUAI VACATION EXPLORER
Eco friendly E-book $15
Sometimes the best part of a vacation is NOT being on a schedule and just going with the flow. Familiarizing yourself with maps, beaches, and etiquette (ie. one lane bridges) will give you a head start and help you to be in sync with the island culture though.This book is also recommended and has excellent and detailed maps.
ULTIMATE KAUAI GUIDEBOOK
And finally, another internet source for travel reviews:
TRIP ADVISOR KAUAI