Some good advice here:
http://www.clarity.net/~adam/winter-storage.html Personally - I'll be emptying the fuel system as well to change the filter (as well as draining the carb bowls) BUT
I will be sticking my long-suffering Duke in a Vacc Bag.....
http://www.vac-bags.co.uk/ Bringing Batteries indoors if your garage is not heated has been mentioned before as a good idea to reduce deposits from freezing.
Personally - I also bring my seats indoors as well (if I can get away with it)
Good luck - Frank