If you are getting ready to store your boat here are some things to do.

Change lower unit oil, If there is any water this will kep it from freezing and busting your housing.

Run stabil or some kind of ethanol/ storage treatment

When storing your engine take the motor toter off and let engine all the way down/ This lets any water trapped in the cooling system to drain.

Go on and put in a fresh set of plugs and top off oil (oil tank will not condensate when full)