Do's & don'ts

DO love your children with all you heart, and show them whenever possible: kiss them, cuddle them, hug them, hold them as much as you can.
DON'T feel guilty if you feel you are spending more time / giving more love to one twin than another for a while (maybe because one cries more, sleeps less, is sick or whatever). Times will change and soon enough you'll be giving the other twin more love / attention and feel guilty towards the first twin. It's normal, and on average they'll probably both receive the same amount of love and attention.

DO love your children more than anything in the world.
DON'T forget to love your husband - their father! - just as much. Without him you wouldn't have these little treasures!

DO listen to advice, suggestions, ideas, etc from friends, family, strangers on the street (oh yes, they'll give you plenty of advice!), books, etc.
DON'T do anything you don't feel comfortable doing or that doesn't feel right. If you are majorly in doubt about a serious issue, talk to an expert - a doctor, a pediatrician, whoever you need who can help you.