It's been a long time since I've been there, but I remember just loving the snorkeling at Hanauma Bay Nature Park. I rented equipment there pretty easily, and it's not too far from Honolulu. I also remember really disliking Waikiki Beach. Too commerical and touristy. There are some lovely and much more private beaches, again if memory serves, near Hanauma Bay though.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher