Every fall I park my bike for 6 months and do pretty much what has been mentioned here:
change the oil
add gas stabilizer to the tank
slightly over-inflate the tires
wash it
put a cover on it
hook up a Battery Tender
Then in the spring I fire it up and we're off. At that point my car under goes the same procedure for the next 6 months.
BTW, I use a Battery Tender Jr., less then $40 at any good battery shop, or under $25 from the USA. It goes on the car battery too.
And don't bother starting the engine every few weeks.