Answer:
well, first, before he even offers advice, he lets katniss and peeta know there is one condition, and that is they cannot interfere with his drinking (haymitch is a big drinker, evidently, and can't live without his beer.). that's the only way he says he'll help them. the first piece of advice that he gives them is:
whatever the stylists do to them, no matter what it is, they shouldn't resist, even if there are things they must do that might be out of their comfort zone.
~hope i helped ouo have a nice rest of ur day~
lots of love,
lee