Fill up your bathtubs. You may have to use silicone caulk to seal the drain. You can save plenty of usable water for later if you need. Don’t forget if your plumbing goes you won’t be able to flush the toilets! Having extra water in the tubs will fill the tanks nicely and anything you don’t want sitting around too long will go bye-bye!
Also, turn the air conditioning down NOW. You should be able to get enough cool air into the house that if you lose electricity you’ll still retain the coolness. Hurricanes are usually cold but when they pass and the sun comes out it will be STEAMY and if you lose electricity for a/c it will get ugly very fast. Most only run fans and their refrigerator with a generator unless you are lucky enough to have a whole house generator backup.
Also get extra propane for gas grills or briquets for the bbq. If your power goes out you can grill what you have in the freezer and it will last longer.
Get the cars into the garage, loosen the lines on boats if you can’t take them out of the water. If you don’t have room to store your patio furniture indoors, throw it into the pool so it doesn’t get blown around.
Trim your trees if you have overhanging branches.
Prepare for a hurricane party!