Surely I, as a writer of salacious things, would be able to help her. Er, good thing you can't see me blushing in my complete humiliation. Undaunted, I did what I usually do in situations like this: I went a'Googling. And yowie, the things I found out!
1. Stock up on cologne, breath fresheners, and lip gloss. (Never mind that there's a whole segment of the population that is either allergic to or can't stand the aforementioned chemical-o-rama.)
2. Lower your expectations. (Now there's some good advice for folks already on the low end of the confidence spectrum.)
3. Look nervous, but don't be nervous. (That is, play with your hair, nibble your lips, giggle for no good reason, and fidget, but don't worry about the bleak inevitable looming failure.)
4. Pretend to be offended or annoyed with the person you wish to entice. In addition, this expert advises invading your target's personal space and in general being as sitcom irritating as you possibly can. Try poking, punching, and insulting, too. (I am assuming this is fourth-grade advice, but it looked pretty literate for the ten-year-old set.)
5. Preen. "Try some hair stroking, posture enhancing, neck exposing, hip tilting (if standing), clothes straightening or lip licking -- all with the intention of calling attention to [your] attractiveness."
In the end, my friend chose to do none of these things. She asked a guy pal to come over and watch some sci-fi TV reruns, and lo! they've been married a few years now. I deeply suspect that the Internet experts are a little off when it comes to stoking romance.