First, they should dicth big publishers or gaming media, they just can't be thrusted. So, they have to know that they are all by themselves now.
Second, stop marketing the wiiu for retards. Really, all 3DS ads seems cool, even for kids, but the pitch makes me miss the dubsteps commercials.
Use their IP's better. Nintendo has a bunch of ips that they don't put to good use since a while. Remenber when 3DS was lacking games and they put some eshop games like pushmo, roller dylon? They should put more of those out. Its incridible how the best ips that could use the gamepad don't even get announced(fatal frame, metroid, battalion wars, star fox). And please, advertise those games properly, not only mario and pokemom.
Embrace indies, the ones that can be trhusted to fill their gaps.
Embrace emerging countries. Here, the price account much more than out there.
"Hardware design isn’t about making the most powerful thing you can.
Today most hardware design is left to other companies, but when you make hardware without taking into account the needs of the eventual software developers, you end up with bloated hardware full of pointless excess. From the outset one must consider design from both a hardware and software perspective."
Gunpei Yoko