Whats the best way to introduce my new puppy to my 2 cats?

I'm afraid the only way to do this is slowly. Separating them together is no good as if they never see each other they can never adjust. What you need is to separate them with a screen between; the idea is that they be able to see each other but not make contact until the kitten is calmer. Also of course let the cat and dogs see each other face to face when you can be there to supervise and split up if needed. But again this is a slow process to be done. It will take months. Just be patient and consistent.. okay..(^_^)