If you are a night life person...or even want to experience local music, I would say Crazy Canucks on Monday nights is a must-do. (Or similar music at Tacklebox on Tuesday and Sunday) I also love a catamaran sail to Mexico Rocks. Searious does a very fun one.

You must eat breakfast at Estelle's for the fry jacks. You must have some key lime pie at Elvi's. You must have a pupusa from Waraguma's on Middle Street. You must sip a beer at the Lazy Lizard at the cut on Caye Caulker.