[narutodemonkill]

For this molecule you cannot really follow the guidelines of drawing lewis structure i.e most E.N is central etc.
(CH₃)₃NO  what I did was make Nitrogen central atom because it has lowest E.N other than carbon.
so 3 ch3 surrounding nitrogen and the one 0 attached to nitrogen so octet( outers shell is filled for every one.

[Black Mage]

I am not sure I see the question here? I see nothing wrong with that you have described, just don't forget your formal charges.