Nintendo: Did whatever we did during the SNES era with all those exclusives and 3rd party support. Make Super Mario Rpg 2 and many other fan favorites that WOULD sell.
Microsoft: Slightly decrease online payments. Fix RRoD. Buy small independent developers (we have the money). Blu-ray it. Warranty extension (make the people happy :P)
PS3: Price drop. Try to make profit out of that. Suicide.
Understanding is the key.