Word of advice to anyone who hasn't ever been in one of these bastards: NOW is the time to panic - not in the middle of the storm.
Tie EVERYTHING down.
Get any loose materials stashed under the house.
Tape your windows up with good heavy gaffer tape.
Anything valuable, get it away from the walls and from beneath light fittings - if you lose your roof, thats where the water pours in through the ceiling.
Actually, if it does look like it's going to cross the coast anywhere near you - get the kids and the pets and your photo albums into the car and head for the hills. You won't get out when the storm surge arrives. A storm surge like this will cause will prevent the Noosa River from draining its ebb tide. You'll have the whole of Lake Cootharabra on your doorstep, then up to your neck, and you won't be able to evacuate. This happens VERY quickly on this river.
If you are directly in its path and unable to leave and you do lose your roof, get under a mattress in the most protected part of the house - laundry, bathroom - get the kids in the bath and cover them up - its the flying debris that will get you - a piece of corro can slice through trees like a razor blade.
If the wind stops blowing abruptly, you are in the EYE of the cyclone. DO NOT leave your safe haven. The wind will come back with equal intensity from the other direction.
Good luck anyone in its path - its a mother and father of a monster. Get safe, and if you have no reason to be here - get the hell out of town.