Freshman Follies

My oldest child, my daughter, will be leaving home for the first time in the fall to attend college. I know this is a survivable feat because I have seen others handle this time of their lives successfully. As a parent, I need advice in handling the seperation anxiety (mine) as well as her (sure to be made) phone calls of frustration when they come. How will I not run to her aid when she tells me she needs me and still sleep nights? Help!