Making sure to save some of the cooking water, drain the pasta and add it to the pan. Sprinkle on the parm cheese and and give everything a toss. The sauce should be slightly loose (it'll thicken as it cools), so if yours is too thick toss in some pasta water a bit at a time. Add salt and pepper to taste. Rip the herbs by hand and sprinkle them on top of the pasta before serving.