Going with the overall theme.

Hitler was a brilliant Statesman, he knew how to "play" his opposite numbers really well. He was a great economist. But he was a lowsy General.

Hitler keeps to the political side and lets his generals run the war side. Doesn't interfere with technological developments (like the Me262 etc.)

War production up and running by 1938/39, and count on a drawn out war in Russia. You only have to look at the map to see how big she is and count how many men you have. Takes a lot to win territory, a lot more to hold territory and a hell of a lot more to develop that territory.

New technologies developed and tested ASAP, and not chopped and changed to suit political whims.

Not declaring war on the US. Let the Japanese deal with that one.

It might have worked.

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"Everything is very simple in war, but the simplest thing is difficult. These difficulties accumulate and produce a friction which no man can imagine exactly, who has not seen war" von Clausewitz 1780-1831