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.
“Sensual pleasures have the fleeting brilliance of a comet; a happy marriage has the tranquillity of a lovely sunset.”
“You guys are the best. I'll see you in a couple of hours. I haven't seen another human being in 13 hours and I'm running out of bottles for my urine. Later guys!”