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What worked for me was this: Don't worry about what you have no control over. Trust that the docs will do everything they can.
All I could control was my disposition. Why make everyone around me unhappy. Yeah, I've got some severe head scars but who cares. Every second is important to me now. The people that are important to me mean that much more, & there are some that mean very little to me now. I made sure the docs & nurses were gonna have a great time seeing me. Things are never so bad we can't find a little humor to make things feel better.
Hell, I was joking around when they were wheeling me in for the emergency procedure cuz things were kinda looking grim for a awhile.