Nintendo could invest in independent 3rd party developers that can creates tons of new IPs, on top of making more varied games than their competitors, who still on that first person shooter phase. Variation and exclusives will win at a time where more and more hardcore gamers are pissed off of the lack of variety.
Most of the 3rd party companies that survived the last 10 years of the recession, are out of ideas. They can drop their franchises for the NX, just that gaming needs new IPs from new developers that can make their games downloadable. Gaming can't take another generation of graphics hounds copying off one another, or else it will crash.
First party wise, Nintendo can drop brand new games at launch and drop HD remakes for cheap. They have to be aggressive with it, cause they don't have the Sony stanbase/ excuses that allows them to go 3 years without an exclusive AAA game.
Also make their products Apple and Android friendly. And keep it simple at the same time.