I was involved in hurricane preparedness and mitigation for years, and attended the Florida Governor's Hurricane Conference many times. In the 80'S and 90's conventional wisdom was to evacuate 3 days before landfall. If you chose not to evacuate and to shelter in place, have at least 3 days food and fresh water on hand. Keep tanks full in hurricane season and fuel on hand for generators. I try to never let my truck's tank get below half in hurricane season.
My best advice is don't live in a storm surge zone.
My experience and observations have taught me that 3 days is not enough for evacuation, due to the population growth on the Florida peninsula. There are just not enough north/south roads to get everybody out. The problem is, if evacuation orders are given that far out, there is a good chance the storm will wobble and hit other than the projected impact area. This results in evacuation fatigue and many will not evacuate the next time due to costs and inconvenience. Unless you are in a storm surge area, your best option may be to harden your structure and shelter in place.
Power loss is a major problem in terms of refrigeration and air conditioning, especially for the elderly. We have lost line power for 3.5 weeks following Ivan. Portable generators can help, but most can only power a couple appliances, and then there is the problem of fuel for the generator. The best solution is a standby whole house generator, with bulk fuel supply and a transfer switch. Fuel type is also important. Most power outages are resolved in a few hours, but if you have extended outages your generator is going to run for extended periods. I opted for a 40kw diesel generator that fully powers two houses. We have a large diesel storage tank for farm machinery. Overkill perhaps but after losing power for weeks I said never again.
Mrs Greener stocks up on canned goods and dried foods at the beginning of hurricane season. I have several cases of MRE'S stashed if things get extreme. If worse comes to worse we have lots of wild game and fish and garden space but unless there is a total collapse it is unlikely we'll have to resort to that for subsistence.
Some thought and steps to prepare in advance will improve your chances and peace of mind. Pro Tip: Hoping a disaster will not occur is not a viable plan.