Garage cleanouts fail from ambition — everything dragged out, dusk arriving, everything dragged back. The version that works sorts in place, in zones, with the haul crew arriving after decisions are made instead of during.
Work zones, not piles

Split the garage into quadrants and finish one before starting the next. Within each: keep-here, belongs-in-house, donate, scrap metal, haul. Finished quadrants stay finished — that visible progress is what keeps the afternoon on track.
The chemical shelf gets respect
Every Knoxville garage has it: half cans of paint, mystery solvents, old gas, pool chemicals, a propane cylinder or two. None of it goes on a truck as-is. Latex paint dries solid with hardener and becomes regular trash; the rest waits for a household-hazardous-waste event. Segregate it early so it doesn't ambush the loading.
Sentiment, contained
The boxes of kids' art and inherited tools will stall the whole project if opened mid-sort. Give sentiment a single shelf's worth of space and one later evening — the garage gets cleaned today, the memories get their own appointment.
The haul that ends it
What remains after donate and scrap is genuine junk: dead mowers, warped plywood, the treadmill that became a coat rack. A crew loads it from the garage in an hour — including up steep Knox County driveways that make DIY trailer runs genuinely unpleasant — and the parking spot returns to duty that afternoon.
Finish line, defined
The afternoon succeeds when a car fits inside again: quadrants sorted, chemicals segregated for the county event, sentiment boxed for its own evening, and the junk fraction gone on a truck.
Steep driveway, heavy items, or a decade of accumulation — say so at booking and the right crew size shows up the first time.