Bye Bye Virginity?

So, I can say pretty confidently that I'm probably going to lose my virginity to a very good friend this Saturday. We've fooled around in the past and we both care for and appreciate each other and trust each other very much. I think it's a great idea, and I'm pretty happy about it. What do you guys think? Also, any tips you can give to a nervous 18 year old about having sex for the first time?