Setting aside my broken heart, I'll add my own suggestion to this thread. I think it's important for the man to set the ambiance for the love-making chamber. Purchase a couple aromatherapy candles and keep them in your ride. Also, burn a CD of some sultry tunes, gotta have some Al Green, Keith Sweat, BoyzIIMen and a few sappy ballads towards the end a la Engelbert Humperdinck and Mario Lanza for the afterglow. Keep the CD in a boombox in your ride and when the moment happens you'll have something to focus on that won't be your own nervousness.
The length of the songs can also serve as a stopwatch for any nasty cunnilingus which you may find yourself performing. Every second down there feels like an eternity, so be a gentleman and give her at least two songs worth.
If you find yourself too worried about premature ejaculation, invest in a cock ring. She'll have fun putting it on you and you'll enjoy the firm pressure at the base of the shaft which delays your big moment. Oh, and don't forget to have a little lube on hand, you never know when it might come in handy.
Last, but certainly not least, make sure she sticks a finger in your butt at some point during the night. Might as well break through all the barriers at once, eh buddy boy?