Use facebook and mobile games to advertise their platform. They need 10x more followers on facebook and twitter if they want to sell 2-3x more hardware and games. Minigames are how you drive up that engagement.
License more IPs for ancillary products (example: a Metroid graphic novel or movie)
Cut eShop prices.
Change retail displays to focus less on game cases and more on a display of the console itself.
Get "street teams" out in malls, festivals, and other places to get people to try products hands on.
Get Nintendo's leadership out of the Direct, they're to awkward and don't have a talent for showmanship -- put youtube stars and celebrities in instead so a larger audience is brought in
Micro-grants for Indie exclusive development. "We'll give you 10k right now if this game remains WiiU exclusive" Or "Here's 1k to start just for porting to WiiU".
Set release dates.
Buy more studios to ensure bigger pipeline of games.
Get an exclusive FPS worth writing home about.
Offer discounts for preorders ($10+ discount if you preorder). This ensures more working capital for game development.
License the WiiU OS/brand into smart TV's. Basically WiiU becomes the SmartTV UI and can download and play eShop games. Maybe allow for a disk add-on.
I predict NX launches in 2017 - not 2016