You gotta start with the actions before sex. Try to stimulate all her senses- maybe lighting a scented candle, silk bed sheets, walk into the room wearing some sexy boxers or boxers briefs, massage her shoulders, soft kisses behind her neck & whisper something sexy in her ears. Once you got all the senses stimulated, its smooth sailing from then on.
Another way to is ask her straight up, what her fantasies are. Both suggestions will guarantee an unforgettable experience.