I've got 2 for ya, Clever!
1) Bring something to distract you the day of surgery - there's actually a lot of waiting involved. I just had my surgery yesterday and I checked in at 8:45, waited about 25 minutes, went back to the photo room to get changed and given instructions by a nurse, waited another 30 minutes for the anesthesiologist to go over my medical history again, then waited another 45 minutes until the doctor came in and did my marks. I would have been going totally crazy if just left to my ticker box brain during these moments! Bring a book (not just your phone, something to KEEP your attention) or a game or whatever - if you're at all into comics, these are great for not having to pay TOO much attention, but being absorbed. Something light and fun and funny is best. I took the book copy of Hyperbole and a Half and it was AWESOME - made the time fly by, could read along with my partner snuggled up on my shoulder, and made us both laugh until we cried. Exactly the spirits you want to be in
2) I was taking zinc, echinacea, and vitamin C up to the surgery to improve my immune system, and when I ran all these by the nurse in my pre-op she ok'ed them all, but when I spoke to the Dr. last night after surgery he said definitely to NOT take echinacea specifically, as it can worsen bleeding. It was definitely good to take all three in the weeks before to keep me healthy (also ate really healthy during this time) - I was TERRIFIED I'd get a cold (which I get rather easily... and have a 1.5 year old niece in daycare...) and wouldn't be able to have the surgery on time, so it also just made me feel emotionally more reassured. BUT I wish I'd known to dx them two weeks before.
Hope these are helpful and good luck! Lots of good stuff over in the stickied recovery update section too