Remember that when you take painkillers the pain is not there but the wound still is - don't overdo it. That said, walking is good, asap after the surgery (obviously not 5 minutes later, but definitely the next morning) and right through the recovery period.
You may feel like walking bent over and hunched up, and that if you stand up straight your wound will open and everything will fall out. It won't - the feeling you can't stand up straight is psychological. Holding a cushion over the wound will help. It's hard to describe - not as scary as I've made it sound though, but will be worth packing a small cushion in your hospital bag.
Great tip above about the water in a sports drink bottle - I'm going to remmeber that for ELCS coming up in three months time.
Don't lift anything heavier than your baby, and avoid certain movements like loading and unloading the dishwasher / washing machine, hanging out the washing. Not heavy work, I know, but the angle it's done makes things hard. I'd delegate for as long as you possibly can.
Stock up the freezer with easy to heat up meals.
The operation room is quite intimidating - lots of people. My arms were strapped down and I was uncontrollably shaking for some reason or other. It's normal, apparently. There will be a doctor somewhere near your head (anaesthetist) who will talk to you and be very reassuring if you do feel a bit scared.
Erm, these all seem to be post op or during op tips. Hope they help anyway.