Get a breastfeeding cushion. For me it has been the My Brest Friend. Really helps plus allowed me to at least have one hand free (see next point).
Most people, and all the pictures, feed holding the baby with one arm so the other is free for picking up cups of tea etc. I as a larger-breasted feeder found I had to support the breast with my hand to keep it in the right place for feeding. That meant that if I was holding DS with the other arm, I was stranded and unable to even scratch my nose. This is where the cushion became invaluable, as then I could lay DS on his side on the cushion and didn't need my arm to hold him up - I do usually put my arm around him, but that's different as I can then at least move it to hold a cup, change channels etc. Depending on your figure, don't feel bad if you can't bf while also doing complicated hand manoeuvres too.
Store up lots of stuff you can watch during the long feeding hours. If you have a Sky+ box or equivalent, fill it up. You'll have plenty of time to get through it all and it saves you being stuck with whatever crap TV is on. Do not underestimate how much time you will spend feeding and thus wanting background entertainment!
If you do want baby to be able to take a bottle, time this carefully. I was advised to do it at about 6 weeks after supply had been established but before DS got much older - I did, and he has always been fine with a bottle.
You will v likely be ravenous. Get whoever is helping you to buy in copious amounts of chocolate and other snacks you can eat easily that will give you energy. Also have these for while you're in hospital - I was starving after every night feed and eating chocolates and biscuits like a woman possessed all night. Didn't help that the hospital food wasn't great or abundant!
Everyone's said this already but you will end up feeding LOADS; it will seem like you barely stop before you start again. Don't worry about this and don't be freaked by people saying 'Oh my goodness, is s/he feeding AGAIN?' The baby will judge when s/he's hungry, no-one else!