Florida... "Rec" fuel which is high octane and no ethanol additives.; "Stabil" every six months the motor is going to sit; Start all motors, engines, etc., every 30-60 days; run to operating temps. Run mowers, chainsaws, trimmers, etc., "dry", then refuel with fresh fuel. You can leave motors "dry", if the fuel you ran dry has a stabilizer that leaves the gaskets, and other parts "lubricated".
I do this all the time with my lawn stuff and my generators. The easy way is once a month start everything, test, and let run for a few minutes. Generators are a "critical' component, so those are run for at least 30 minutes.
Schedule the oil change every six months. drain, check and in this day and age, a good synthetic works fine. In Florida, all changed after hurricane season (end of October). Then in April-May as the rainy season starts.
Filters... If any of your "stuff" has fuel filters... Change them in the spring cycle.
My thoughts and experience from living in the "swamp" for 30 years.... LOL!!!
Later,