Hitler keeps non agression pact with Russia. Focuses on mass production manufacturing of the proven good weapons, Panther and Tiger tanks, 88s, Mg-42s, the best trucks, subs, fighters, and bombers. Go for strategic bombing targets in England instead of carpet bombing, and delay Jap invasion of Pearl, and eventually capture Great Britain. Spread throughout Europe and North Africa but do everything possible to delay the U.S. from declaring war with negotiations, peace treaties, whatever it takes. Any thing else is pretty irrelevant because whoever developed the atomic bomb first would win the war.