~Sorry for the crappy resolution.
The most important part of mastering any individual style: the face.
1. Kishimoto makes his eyes in two basic shapes. Square and rectangle. Square for the young/naive character. And rectangle for the wiser/sly character.
2. Kishimoto tries to put some realistic anatomy principles into his face. The nose changes usually on the angle of the head, and if the nostrils show or not.
3. His faces are usually round, not angular like most anime styles. I haven't seen many other face style then the two; fat and skinny.
Hope these help anyone trying to master the Kishimoto style! I'm still learning, so if I've mistaken anything let me know.
Naruto and reference images (c)
Tutorial by me! (aka: ~xHaimarux