I never look in the mirror, that way I do not see my mother - one of my abusers looking back at me!
I deliberately keep my hair in a style and colour mother never had so I can convince myself that it is not mother I see in the shop window reflections!
it is possible to change accent in your voice, it took me a few years of consciously thinking about how I should say things before they became natural, but now no one ever guesses where I came from, often thinking I am not even from England!