I always assume that the character in the game is actually a character in the world and that in essence I "nudge" her where appropriate and provide for her as necessary.
In other words I don't play her as if she was an extension of me, I treat her as an entity in her own right with whom I interact when required...
If that makes sense.
This is generally how I role play in TES games, and most games in general. I only "become" the character when I'm playing pen and paper D&D.
I find that the OPs method only works well in a few games, and I have no idea which ones those are...

I think of myself as the voice in my character's head. Their actions and decisions are, for the most part, their own, but sometimes they need that voice to pipe up and offer some advice.
This is another thing I will sometimes do.