Tell you that all women and breasts and babies are different shapes and sizes, so positioning advice is only that - you have to find what works for you and it's why there's so much contradictory advice out there.
Find some way to explain the difference between hurting in a normal way and hurting because something's wrong - I kept complaining that it was hurting and being reminded that was normal - turned out it was thrush.
Have nipple shields to hand. I was advised that I should try some but the hospital 'wasn't allowed to provide them because we're baby-freindly' wtf... Turns out no local chemist sold the buggers either so I never had the chance to try.
Tell you where to get help once you leave hospital, ie lists and opening times and phone numbers of all local milk cafes, bf cousellors, etc, in a handout.
Mention that actually there's a room down the corridor with a sofa and telly for comfy bfing. I spent most of nights 2 and 3 in hospital on the sofa watching Bollywood movies and getting the hang of bf in my own time, and it was great - no-one else ever came in!
Actually the bf advice I got was pretty good, trying to let me start en route to postnatal ward (but ds stopped breathing instead), suggested that I just give it a go every time he's awake and incorporate it into cuddling him, and on day 2 reassuring me that as he'd fed a few times, maybe he just wasn't hungry and not to worry until at least the evening, just keep offering. And on days 2-3 lots of mws and docs were happy to take time to watch bf (paediatrician finally managed to catch him in the act and gave a few suggestions). Seemed I was the only woman out of about 40 on the ward to be trying to bf at all so they were delighted to actually have a beneficiary for their training!
Main problem wasn't bf-specific but that I was on a drip and catheter and ds was put in a cot out of my reach, and when I called mw told me they 'weren't allowed' to pass me a baby (wtf2!). Luckily I had a terp with me who did do. And a bonkers mw who turned up at 2am when the terp couldn't take the smell any more as I'd been lying in diarrhoea for 4 hours, and her reaction to me saying "I haven't been given my painkillers, I've been lying in shit since 10pm, but hey, at least I've managed to bf twice for about 10 minutes each [burst into tears]" was to say "If you haven't bf for at least 15 minutes each time, it doesn't count!", slam the door and walk off. [wtf3!!]
Luckily at this point the terp announced she used to work in a nursing home, broke open a cupboard and decided to clean me up, and then two cheerful cleaners came in, got everything clean, and took some time to basically tell me I was wonderful and me and baby would figure stuff out and it was only day 1 and things would get better (I couldn't understand their words but got the general gist).
Their help was probably the most important of the lot. Not being neglected at night when women are particularly tired, low, and worried is vital, IMO.