The gas stabilizer is really important AND running your car for 5-10 minutes after addig it gets it into the carbs to protect them. I use "Star Tron" but "Sta-Bil" for Marine use works well, too (it's gray). Add it at the gas station and then drive home and you'll be all set. Decide at home if you need to top off the tank - you really want it full. It's great for all your yard equipment, too.
Go to Walmart or Autozone etc. and get a "Battery Tender". About $20 - $60 bucks and it trickle charges your battery all winter. One amp or so is fine - Hook it up and walk away.
You could change the oil before storage, while some people change the oil in the spring - you decide.
Do not put moth balls inside your car. For one, they don't really work and for two, the car will smell like moth balls in the Spring. Use Bounce Dryer sheets instead (but I'm not really convinced that they work either).
Do you have a full-car cover? If not, just throw a blanket or sheet over it to keep the dust off.
Personally, I don't start mine up from time to time during the winter - I just let her sleep until the first run in the Spring.
That's all I can think of in addition to that mentioned above.