Jeanne is certainly doing her own thing. Everyone in a coastal community from Port St Lucie northward to Melbourne needs to be prepared for cat 3 winds (111-130 mph) capable of producing structural damage. For most people along the coast, that means evacuating! Everyone else in the "cone of concern" needs to be paying attention to knowledgeable weather forecasters and be prepared for damaging winds, as already noted - trees and mobile homes are most susceptible to damage and to cause damage to other structures. There is no need to panic. Just be prepared and pay close attention to what Jeanne does the next 24-36 hours.
Jeanne is unlikely to make it to the GOM as much as it looks like it might. The approaching trof and shear to the west and north will start steering it north, but not until tonight. If nothing else, pray that Jeanne turns north even sooner before it reaches the coast! Also pray that Jeanne weakens quickly after making landfall!
"Prepare for the worst and pray for the best."