Well the warning is in so batten down your things. Here's a few things I have done:
1. Filling my clean "blue bin" with H2O for the toilet tank.
2. Filled clean coolers with about 25 gallons of potable water.
3. Installing fresh batteries in my 4 LED lanterns and 5 flashlites.
4. Made sure my butane stoves works and picked up a few cannisters.
5. Topped off my gas tank.
6. Took detailed pictures of my roof, windows, gutters and 30 panel PV system just in case for insurance purposes.
7. Helped neighbor double strap his 17 footer to his trailer and double chaining the tow ball.
8. Removed or tied down anything that would become airborn in the backyard and patio. Many plants large and small.
May think of ideas later, feel free to add your recs. Good luck everyone.