Better practices with subdivisions surface modifier I'm learning blender with help of the wiki, and other articles around the web(including blenderguru and blender artists).

I'm trying to make a model for a character that I've sketched, but Im having some problens with the junctions of his neck, this makes me wonder what's the best practice for creating a junction such as this one.

First try render result


Mesh of the first try


Second try with subdivision modifier


Any light on this matter?
It looks like your neck is not actually connected to the body. Try deleting the shoulder face, then select all the base neck vertices plus the 4 shoulder ones and hit "f" to create a face. Then try the subdivision again.