1.Storm surge causes the most damage to boats, not wind. Make sure to slack your lines.
2. Because of storm surge boats fare better at marinas with floating docks and tall pilings compared to fixed docks, or floats and short pilings.
3. Whether battening down ashore, or afloat, reduce windage by lowering antennas and removing canvas.
4. Make sure your batteries are charged—especially if you don't have a generator that they will run the bilge pumps. Wiring in extras in parallel isn't a bad idea, since if power goes out, so does shorepower.