Well, first you check to see if either side is surprised, and determine the distance between the parties. Have both sides roll for initiative…
…oh, a sexual encounter?
Those don’t happen in D&D, so follow the good advice you are given here.
Try it sober for a change of pace.
[Lawrence]
Two chicks at once.
[/Lawerence]
Does the 88 in your name stand for your year of birth? If so, then you’re about the same age as my little sister. Which, ew!
Anyway, assuming you weren’t born in 1988…speaking as someone who shared her first sexual encouter with a virgin male who didn’t know jack…try foreplay. Really. She’ll feel like it’s longer, even if you can’t control how long the actual act takes. Remember that many females can’t get off from intercourse. Try other means of stimulation down there. If you can’t figure out how to service her…ask. Really. I wish my ex had; I could’ve showed him how. Boy never gave me an orgasm. I faked it once for him, though.
Well I’ll take it that your a guy and young. My being a guy too it makes it easier to give advice.
Women aren’t into sex for the sake of sex only. They like the whole package deal:
Romance, friendship or companionship, sexual tension and chemistry. So she has to feel good around you… trust you… etc… My experience has been that sex in the beggining for any couple is less than ideal for women. Even if you’ve been dating forever… its still “uncomfortable”. You don’t know her body… nor vice versa.
Remember that different people like different things… don’t assume that since your last affair loved chocolate covering her nipples that the next one will too. 
Now to the Encounter itself:
- Well a little alcohol helps relax, a little too much is bad though.
- TIME… have plenty of time. Hurry is bad. Don’t start 1 AM either.
- Music is great for ambience… candles are a bit too much maybe.
- lots of foreplay and a clean place.
- Finally think of her first and foremost. Unless you’ll never see her again.
Do it in the back of a Nissan?
Be careful though. You could end up minimizing the sexual encounter if you use this method. 
wow, you really aren’t that bright, are you?
Ingredients for maximizing a sexual encounter:
1 jar of honey, warmed (not scalding)
2 people, undressed (if you plan on more people, get more honey)
Apply honey to people. Remove with tongue. Repeat.
Caution: I don’t know if honey reacts well with condoms, JIK don’t use as a lubricant.
something about 1.21 gigawatts, i think.
Ambience is very important. Anything less than fifteen dollars an hour for the motel room is totally unacceptable.
I have to jump in here, even though probably I oughtn’t to contaminate the computer in this hospital parent’s lounge with, quote, “potentially offensive, disruptive or harrassing materials…that contain sexual implications…”
Ahem.
If all you want is to get off, buddy, go rent a video, get some lube, and spend as long as you like watching unreal women get f*cked by unreal men in unrealistic positions for unrealistic periods of time, and scream with delight forever without actually ever reaching orgasm. You can be as selfish as you want and never have to communicate with anybody. Ever!
If you want to enjoy sex with another person, remember - she’s another person, with her own life, her own parents, her own problems, her own personality, and her own likes and dislikes. She is not you, she cannot read your mind, there’s a good chance she won’t enjoy the things you think she ought to, and there’s a very very good chance she won’t perform the things you think she ought to, the way you think she ought to. She also may not want sex as often as you will, assuming there is a second time. Some of these things will improve with time, good communication, patience, cooperation, and meeting each other halfway.
Oh, and, you can’t read her mind, either.
I think it’s hard for some men to really grasp the concept that sex requires the woman to permit another person to invade her body with his body. Invade. I use that word deliberately. I have heard too many stories of men who think that because they have a girlfriend, or even a wife, they have unlimited rights to have use of her body any time they feel like it…and if she doesn’t feel like it, it’s okay for them to whine, sulk, insult, or get angry about it.
Nope, sorry. It’s not your body. You ask. If she says no, go take care of yourself, you’re a big boy.
If she says yes, remember what Starguard said:* …don’t just lay her down, ram it in and keep pushing till YOU are satisfied, then roll over and go to sleep with your back to her. * Intercourse of that sort is boring. Very very boring. Not to mention chafing. And frequently painful. And sometimes emotionally violating. And sometimes legally questionable. Instead, say “Will you show me how you like to be touched?” “Will you tell me when I’m doing it right?” And also, “Please don’t lie to me by faking. I can’t ever learn to do it right for you, if you do that.”
Talk. Talk while you’re in bed together. Play. Play silly little games. Be indirect. Don’t dive for the clit and wham bam expect her to scream in ecstasy, it won’t work.
Oh yeah. And wear a condom, for everybody’s sake. <Insert obligatory personal insult here.>