Do everything for Battle of Britain:

* Maintain focus on RAF Fighter Command (no early switch to bombing cities)
* Delay Operation Barbarossa until Britain is neutralized
* Integrate Luftwaffe–Kriegsmarine planning for ''Sea Lion''
* Commit to winning the air war before invasion
* Choose a single clear objective (destroy RAF '''or''' force negotiation)
* Concentrate attacks on southeast England (11 Group’s area)
* Sustain attacks on radar stations to blind RAF
* Target aircraft factories and repair depots alongside airfields
* Ensure strict bomber escort discipline with fighters
* Use mass, staggered raids to overwhelm RAF defenses
* Combine day and night raids for constant pressure
* Introduce drop tanks for Bf 109s earlier to extend range
* Forward-base fighters along the Channel coast
* Increase use of Ju 88 bombers over slower types
* Upgrade bomber defensive armament
* Use Bf 110s as fighter-bombers rather than escorts
* Rotate fresh pilot units into heavy combat zones
* Reserve Stukas for high-value strikes after RAF is weakened
* Deploy U-boats to blockade Channel approaches
* Lay mines at key British ports to disrupt RAF supply lines

After that in 1941, delayed Operation Sea Lion has a ~35–40% of being feasible and a ~25–30% success rate.