Anything that's different from your own realm of experience as a human being, whether it's driving a car or a boat, or using guns, anything that separates you from yourself and leads you more towards this character's existence is a big help.
I get so nervous on stage I can't help but talk. I try. I try telling my brain: stop sending words to the mouth. But I get nervous and turn into my grandma. Behind the eyes it's pure fear. I find it difficult to believe I'm going to be able to deliver.