1. Make sure you have insurance that covers tornado damage.
This is the time to get to make sure your policy will cover what you need it to cover in the case of a tornado. I've been into an area struck by a tornado in Alabama and I've seen the extreme damage. Please make sure you don't take for granted just how powerful these storms are, and the damage they can do to your home.
2. Run drills.
It's always better to practice your plan before the event of an emergency so that when the time comes you know exactly what to do, and exactly where to go. Don't assume you will automatically do the right thing. Practice make perfect.