Our initial trip to Belize was for vacation and it was many years ago, so last year we booked a flight to Belize to go on a fact finding trip, with the idea of retiring in Belize. Months before we left, I read several books on Belize (see Taking Belize blogs recommended reads) and anything on the Internet that I could find related to retiring abroad. We only had a week, so I made a list of things that we definitely wanted to check out while we were there. Belize is a small country but a week is really not enough time to see everything, so you may need to make several trips to Belize.
On our first trip to Belize we flew back and forth from the island to the mainland in small puddle jumper planes, but in September we chose to take the water taxi's. We took a water taxi to Chetumal, Mexico to check out the shopping available there. We also made visits to many of the island grocery stores on Ambergris Caye.
English is widely spoken throughout Belize, so it is easy to travel independently in Belize. We found the Internet was available in most areas of Belize, so if you needed to make a quick reservation, it was no problem.