Change the oil for sure, especially if the last couple of rides were short. Condensation combines with chemicals in the oil and combustion byproducts to form acids that aren't especially good for the engine.
There should be a drain screw in both of the floatbowls. With these you can completely empty them, better than just running the engine untill the level is too low to run. The resedue left behind when the leftover gas evaporates will not completely dissolve whe you start riding again and that can cause you problems.
Make sure the fuel tank is filled to reduce the air volume and minimize condensation. Even better would be to empty the tank, empty it and set it upsidedown with the cap removed.
The tires will fare better if you can raise the bike enough to take the weight off them. Lifting them off the floor is better yet.
The battery will do best if it is removed and set on a board (a wood shelf would be ideal) where it will be dry and cool, but not terribly cold. it should be kept fully charged but not overcharged.
A heavy coat of paste wax on the painted *and* shiny metal will make spring cleaning easier and help guard against oxidation.
