The town has no airport - the nearest is in Bastia, about 45 minutes' drive. There is no train station. You can arrive by boat as the town has a marina. There is a large free car park on the road towards the cathedral. There's paid parking for 1.20 euro per hour next to the marina.
If you come to Corsica by plane or ferry, be prepared to take a taxi or rent a cars, as there is no local public transport to talk about. A taxi from the port in L'ille-Rousse to Saint-Florent is easy 50 euro.
It's a small place, so everywhere is accessible by foot.
It is possible to rent a bike or a scooter from different locations in the city center.
The pretty harbour and harbourside restaurants. There's a citadel just behind the port.
Fish from the poissonerie.
There are many restaurants in St Florent, many specialising in seafood. Most of them offer a dish of the day for a reduced price (13-19 euros) at lunch or dinner.
Note that the supermarkets close just after noon and reopen in the late afternoon until 7 in the evening.
There are plenty of cafe-bars too.
The nearby village of Oletta has a wondeful 'auberge' which serves superb food with an even more amazing view.