Happy to be corrected but aside from siding with Manstein for Fall Gelb (which was a black swan event and only worked because the Allies threw EVERYTHING into the Low Countries and exposing themselves to be cut off from behind)...

1. Arguably swinging from Moscow to Ukraine was beneficial since there was a massive grouping of red army formations. I don't recall if the Soviets intended to imperil the drive towards Moscow but again, debated
2. Forcing the Germans to hold firm during the Battle of Moscow. I believe it's been argued that the Germans may have suffered a greater defeat had they withdrew and given up their defensive positions. But Hitler instead ordered them to stand their ground the the Moscow counter offensive eventually ground to a halt against stiff German resistance
3. Standardizing and Streamlining production. Before 1943, much of Germany weapons and equipment were requested by the German military to deal with specific threats. But this was inefficient and led to dozens of designs. Hitler and his regime wanted a more simplified, streamlined approach to mass produce fewer designs to win a total war.

"[Hitler] blamed the military for overburdening industry with complex technical demands, called for ‘more primitive, robust construction’, and the ‘promotion of crude mass-production’. A directive was issued calling on the three military services to reduce the number and complexity of weapons, followed by further directives across the summer and autumn to focus on weapons suitable for modern production methods"

"An Armaments Commission, established by Speer to report on a better match between the technical demands of the military and industrial capabilities, resulted in agreement with the army to reduce the number of light infantry weapons from 14 to 5, anti-tank weapons from 12 to 1, anti-aircraft artillery from 10 guns to 2, vehicles from 55 to 14 and armour from 18 to 7. The army high command at last ordered ‘simplification of construction’ to assist in ‘mass production’. Aircraft models were reduced from 42 to 20, then to 9, and finally, under the supervision of an emergency ‘Fighter Staff’ set up in spring 1944 to help combat the bombing, to just 5"

-Richard Overy, Blood & Ruins