Most of those I've seen send Naruto back to his Academy days, with some random spiel by Kyuubi about how if he tried to go back before the seal it might kill them both.
One that handles things a bit differently was Crimson Skies' This Time Around, in which (thanks to Weird Fu from the battle at the Valley of the End) both Naruto and Sasuke are sent back, to when they were six years old, and have to come up with a plan to prevent the Uchiha massacre...
Also, Two Steps Back, where it's an older, possibly wiser, Sasuke, who goes physically back to the past...--
"I give you the beautiful... the talented... the tirelessly atomic-powered...
R!
DOROTHY!
WAYNERIGHT!
--
Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.
One that handles things a bit differently was Crimson Skies' This Time Around, in which (thanks to Weird Fu from the battle at the Valley of the End) both Naruto and Sasuke are sent back, to when they were six years old, and have to come up with a plan to prevent the Uchiha massacre...
Also, Two Steps Back, where it's an older, possibly wiser, Sasuke, who goes physically back to the past...--
"I give you the beautiful... the talented... the tirelessly atomic-powered...
R!
DOROTHY!
WAYNERIGHT!
--
Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.