I"ll drain/clean the gas tank; install new fuel/air filter; change
plugs and oil before starting.

Any more preventive maintenance items before I "turn the key"?

You might not need to replace the plugs if they look OK, but while you have
them out I would spray something like WD40 into the cylinders to lube them
up a bit. Then try turning the engine a bit with them out to make sure the
cylinders aren't too rusty or dry.