Make sure you pick them up at an agreed time and you know where they are going. Double dates with friends is a good idea. And open frank discussions about the realities of teenage relationships that can sometimes happen, i.e. pregnancy etc. Knowing the boy or girl's parents and agreeing on limits and rules i.e. no bedroom door shut, getting back by a certain time etc. All teenagers will push limits but you need to have limits and reinforce how much you care about them and value their well being. Good luck!