>>17766917
>Halt the Normandy landings and drive them back with extreme prejudice
>Somehow destroy the Soviets at Kursk and seize whatever industrial and war material you possibly can
>Pump the puppets for more weapons
>Invest HEAVILY into fighters and flak defenses and never stop making them
>Scrap the big heavy tanks and start cranking out as many medium and light tanks as possible
>Tune up the intelligence services and possibly execute all of the higher echelons of the state intelligence agencies and replace them with people who actually know what they're doing
>Slap Hitler until he stops being a retard and allows his most able commanders to actually lead the war effort
>Tell Japan to make a fucking effort to take Russia from the rear since they're busy fucking you up in the West or declare you'll war on them (bold move but desperate times)
>Change the military communication codes entirely
>Stop going after the allied shipping and have the submarine wolf packs engage the enemy navies and pick off whatever they can
This isn't a surefire victory by any means, but these, off the top of my head, are the only ways I can imagine Germany turning the tide. Hitler's break with the Prussian generals really was the moment shit went south.