Pissin off the enemy. Let me list a few things.
-Fly over a vehicle battle and wipe the battlefield clean of offending enemy GVs and then take out the vehicle hanger directly or ask a squaddie to hit it as I lay waste to the enemy in order to buy my side time to set up a spawn camp, lay/run supplies, etc.
-Launch a GV assault on a base with the intention of parking GVs all over the airfield, porking nearly everything and then try to tank-vulch the fighter jocks as they frantically try to up! I love parking Tiger tanks OTR and blasting LA7s and Nikis, hell any plane, but those 2 are faves to blast OTR.
-someone already listed using nose bleed alt bombers and then proceed to bomb radars from as many bases as I can.
-I like sinking CVs, then resinking the CV at its home port for an hour or so just buy my side some time to make a move against the port.
-Talk smack on 200