That the best piece of advice is to ignore all advice
To give in to what's happening and just let it all happen. To chill, not panic and trust your instincts. Routine, co-sleeping, who cares, do what feels right and makes you, DH and baby happy.
To believe you can do it and it will be fine.
To trust DH more and to give him a break, he doesn't know what to do either for you or for the baby anymnore than you do.
To go out leaving baby with Dh much quicker and to trust it will be ok, get your hair cut, go shopping, do soemthing without a baby attaced to you.
To fill the freezer before baby comes and make sarnies in the morning so you do actually eat.
To believe that you can take them out in the cold/warm in the buggy and learn to ignore tutting old ladies, and that not all babies like slings.
To know that the first six months can test your relationship to its limits but that when you get through it, well you know you can get through anything.
To remember that you do have dark days and moments, but that you have wonderful ones too and that both are totally normal.
To remember there are some things in life you have to experience to really understand, birth, death, marriage etc and that no one can really prepare you for what's coming. IT's all part of the journey.