In many Sasuke - Sakura - Gaara fanfictions, Sasuke saving Sakura from Gaara can be a really exciting plot. It often shows Sasuke's strength and his hidden feelings for Sakura. Maybe he uses his Sharingan to outwit Gaara's sand attacks and rescue Sakura just in time.
Well, in the fanfiction, Naruto could save Ino from Sasuke by appealing to Sasuke's former friendship. Naruto might talk to Sasuke, reminding him of their days in Team 7 and how Ino is also their comrade, which makes Sasuke change his mind and let Ino go.
Simple. Naruto is a hero at heart. He can't stand seeing anyone being hurt, especially his friends. Ino is his friend, so he has to save her from Sasuke.
In this kind of fanfiction, Itachi might use his powerful Sharingan abilities. He could perhaps create illusions to mislead Orochimaru and his minions, then quickly snatch Sasuke away. For example, he could make Orochimaru think that Sasuke is in a completely different location while he secretly approaches and rescues him.
Maybe Sasuke is being manipulated by an evil force that wants to get at Naruto through Hinata. Since Hinata is important to Naruto, targeting her would be a way to hurt Naruto.
The first key element is Naruto's understanding of Sasuke. He knows Sasuke's past, his pain, and his motives. This understanding allows him to approach Sasuke in a way that can reach him. Second, the role of the ninja world around them. The village's values, the other characters' opinions, all can influence Sasuke's journey. For instance, if the village shows forgiveness and acceptance, it can be a factor in pulling Sasuke back from the dark. And finally, the internal struggle within Sasuke. There's the part of him that wants to be saved by Naruto and the part that is consumed by darkness, and this struggle is central to the fanfiction.
In fanfiction, Sasuke might save Sakura from Orochimaru by using his Sharingan. His powerful eyes could detect Orochimaru's moves and counter them, allowing him to rescue Sakura.
Well, in one possible scenario, Sasuke might be under some sort of dark influence. Naruto, being the hero he is, senses Hinata is in danger from Sasuke. Naruto arrives just in time, using his newfound powers, perhaps a combination of Sage Mode and his Nine - Tails chakra. He blocks Sasuke's attack aimed at Hinata and then tries to reason with Sasuke, reminding him of their past friendship and how Hinata is an innocent bystander. Eventually, Sasuke relents and Hinata is saved.
In the fanfiction, Itachi might be acting according to some secret mission that endangers Sakura's life. Sasuke, who has a strong bond with Sakura now, won't let that happen. He jumps in and uses his ninja skills. Sasuke could have developed some new jutsu that he uses to counter Itachi's attacks. This not only saves Sakura but also shows Sasuke's growth as a ninja. And Sakura, in turn, might be in the middle of researching some important medical ninja stuff that Itachi's actions could have disrupted if not for Sasuke.
One common theme is the display of Sasuke's heroism. He is often depicted as the strong and capable ninja who can overcome Gaara's power to save Sakura.