For Diving you can contact Blue hole Dive Center,they treat you excellent and make sure that you are always happy. They usually use Amigos Del Mar to do the diving but if the trip is cancelled they try to get you out there with another boat
There are tours on the mainland, (Lamanai,Xunatunich, Altun Ha)these are all ruins tour, there is also the Cave tubing.
On the island you can, since you are staying in Ramons Village, grab the snorkel gair and go swiming right off the dock pretty cool. You can also go to the guys at Ramons and get a golf cart. Ask for Francis, he will help you.
If you and your hobby are the party cople, go to Jaguars, Barefoot Iguana, (Big Daddys is a nice night club but I do not like it cause sometimes the guys that get drunk start disrespecting you.) That is why I preffer the other two. There is Sharks Bar, Mr C's Bar, oh my there is a whole pile of them. for food any place you try will be good, for breakfast go to Tropical take out, they give a big breakfast.