Hilary Mantel

If you get stuck, get away from your desk. Take a walk, take a bath, go to sleep, make a pie, draw, listen to music, meditate, exercise; whatever you do, don't just stick there scowling at the problem. But don't make telephone calls or go to a party; if you do, other people's words will pour in where your lost words should be.

I love rehearsing because in rehearsals there are no mistakes, nothing is wrong, some things apply or lead you to focus on the character and the things that don't apply are equally valuable because they lead you to towards what does.