Sending good wishes to the people (from the above comments) who are having surgery soon.
For what it's worth, I had the idea to tell myself very positive things before surgery, and it steadied me a lot. I specifically told myself that I was INVITING the surgeons and their team to help me, and what I meant was to tell my mind, explicitly, something like, hey this is going to be weird, but it's a good thing because it's on purpose to help me with the acoustic neuroma problem.
Second, I vowed to be grateful for the help, deeply and sincerely. I appreciate expert medical care. 100 years ago, for instance, would not have been a good time to need this type of surgery.
Lastly, I kept telling myself I would be good at healing.
Those three things seemed to make the pre-op hours easier and the post-op hours, too. No one likes getting surgery, but it is good to prepare your mindset.
I'm 13 weeks post-op, and I could not be any happier with my outcome from surgery. Wishing the same for you'all.