The old timer at the St. Louis trade show showed me a bent coat hanger trick and I still use it
Back in 2011 at the sweeps convention in St. Louis, a guy in his 70s bent a coat hanger into a hook to pull a stuck brush out of a flue in like 30 seconds, and I've kept one on my truck ever since, so what's the one old-school trick you picked up that no tool catalog ever sells?