Well, in some fanfictions, Naruto gains control of the Kyuubi and then he starts to train others in how to better handle their own inner demons or chakra beasts. It's like he becomes a teacher of sorts. Another common plot is that Naruto uses the Kyuubi's power to travel to different dimensions. He might go to a dimension where the Uchiha clan was never massacred and try to prevent the events that led to so much pain in his own world. And then there are those stories where Naruto, with his new - found Kyuubi - controlled power, challenges the very idea of the ninja hierarchy and tries to create a more equal society among the ninja.
One popular plot is Naruto using the Kyuubi's power to protect Konoha from a new, powerful enemy. For example, he might face off against a group of rogue ninja who have united to take over the Hidden Leaf. Another plot could be Naruto exploring the memories of the Kyuubi, which leads to him learning ancient ninja secrets. This could involve finding lost jutsu or understanding the history of the ninja world better. Also, some fanfictions might have Naruto using the Kyuubi's power to finally bring peace between the ninja villages by showing his overwhelming strength and his will for peace.
Chapter 368, "You Don't Deserve to Be My Mother", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I haven't detained anyone, how could I possibly detain him?
Chapter 471, "This is What Happens When You Abandon Sister Li!", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event.
Chapter 725, "Still Want to be the Second Young Master of the Jiang Family!", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. The chapter gives readers a real answer by opening on Though Rong Jusheng is known for being righteous, he's anything but...
Chapter 576, "The Electronic Pickles are Gone!", is the clearest early answer because it turns Ai Xiaochun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Tonight, Team Q exceptionally didn't cook.
Chapter 575, "The First Time Threatening Someone Feels Quite Marvelous", is the clearest early answer because it turns Sis's situation into a concrete plot event. The chapter turns that into something concrete by moving from Is there really no way to get any money out?" After some...
Chapter 731, "Ye Chu Died", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with Dean, can I really not do it? and closes on She'd been acting off these days.. The key payoff is that the chapter closes with "Why did you come to the sanatorium?
Chapter 707, "I am Daoist Qingfeng", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Su Yinwan hadn't finished her dessert but, feeling agitated, had...
Chapter 797, "Bu Fan and Bu Chen", is the clearest early answer because it turns Bu Fan's situation into a concrete plot event. It opens with The night grew deeper, and while waiting for news, Jiang Li dragged...
Chapter 703, "Slap Oneself", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Wu Daoshan quietly raised his head to size up Zhao Lang, and sure... and closes on Young Master Gu was intending to back Jiang Li..
Chapter 595, "Four-legged Black Toad", is the clearest early answer because it turns Four-legged Black Toad's situation into a concrete plot event. It opens with Jiang Li steadied himself with support, endured for a while, and then...