Miami is a nightmare as far as traffic goes. Your best bet is to go through at 0200- 0400 on a Sunday morning.

Do the loop when you get to Daytona. Go North from Granada to A1A. When you get to A1A go North again. Stop at the first bar on the right (the name slips me at the moment) it's right on the beach. Great view and good food, with cold drinks. Ride up to Flagler (North) and stop at the small farmers market for some fresh fruit. From there you can ride all the way to St. Augustine or Jacksonville for that matter.
You will want to go to Destination Daytona. Lots of vendors but it shuts down around 1000 or so. When you leave there head south on US 1 it will take you by the Iron Horse and The Broken Spoke. They stay open pretty late. Don't forget to go to Main Street but be prepared for stop and go traffic and a hot engine. If you want to park on Main get there early. Don't worry though there is lots of off street parking for $$. Main is free parking.
The speedway is pretty spread out so plan on being there at least one whole afternoon. This is the place to go if you want to try out any of the new bike models that the Big MoCos are bring to the table.
The Cabbage Parch is the place for old bike parts and coleslaw wrestling.
The cops are pretty tolerant but make sure you and your bike are legit. Wheelies, burnouts and general tom foolery will get you a ticket. Quick!