If you're looking for help on winterizing your boat, check out this article. It provides some great tips and procedure for ensuring that your Mariah comes out of storage just as perfect as when you put her in!
Winterizing, what a sad time. I just bought a instant shelter for my boat. It is basically an oversized tent. So far it seems like a good investment. It will have to do until I can afford to build my 30X50 garage. With 3 small kids it will be a while.
One thing to think about is a good cleaning of the bilge area. That way if there are any leaks over the winter it is easy to see come spring.