You've done all you can do. It's time to let the little bird fly on its own. With enough practice sessions and guidance from a wise parent such as yourself (one who refrained from stomping the imaginary brake pedal and hissing through clenched teeth), your new driver is finally ready to take wing. Just remember: Without a second pair of eyes in the car, new drivers have to be even more careful and pay even closer attention to what's happening around them when they're driving solo. Practice helps, so send her to the store for milk, send her out to pick up her little brother from Little League and give her a time by which you expect her to return.