The beauty in your surroundings - priceless. Cha Ching!
AMI (Anna Maria Island) is so small it'd be easy to do a bike tour around the entire island in an hour or less. If you're into fishing, can't find any better than off the City Pier. The Spanish Mackerel usually run in the morning and early afternoon. Tie on a white crappie jig and go at it. They're very tasty grilled or blackened and baked.
Coquina Beach, on your way from Long Boat Key to AMI, is also a nice stop off point. The beach is very wide with lovely shells. If you can get south to Venice Beach, you're guaranteed to find shark's teeth in just about every scoop of sand at the shore's edge.
Have fun. I'm envious.
Specialized Ruby/Selle Italia Flow
1991 Specialized Sirrus, steel frame
Dahon Eco C7
Surly Long Haul Trucker/Terry Fly RS
Trident TWIG Recumbent