Don't shy away from staring him down, but do it the right way. Ease into it by practicing triangular gazing, where you look at one eye, then the other, then at his mouth. Strauss says practicing this for just a day will get you ready to start learning to interact with single men you're attracted to. Once you've locked eyes, keep looking: one study showed that it takes about 13 glances before the average guy approaches a woman!

Before you approach a guy you're into, make sure you've got the basics of small talk down. "Challenge yourself to go out and make small talk with five strangers today," advises Strauss. "Don't worry about whether they're people you want to date. Approach grandfathers, other women, someone who's not your type, whomever you come across. It'll help you adjust to stepping out of your comfort zone."

Want to get under his skin? "Get just a centimeter into a guy's comfort zone, and look up at him with big eyes," says Strauss. The no- fail move? "Put your chest out, chin down, eyes high in the socket, head slightly tilted, and your weight on one foot. That's important. If your feet are planted, they feel the resistance, just as much as they would if you had your arms crossed." Practice makes perfect -- you might look like a cross-eyed chicken at first, but get it down right and it'll make him crazy.

Don't think too long before you open your mouth or it'll come off unnatural and awkward. "People sense it when something sounds too premeditated; that makes them uncomfortable," Strauss says.

When it comes to conversation starters, asking for his help or opinion is a sure thing, says Strauss. "Maybe it's some article from a women's magazine that offers some kind of advice and you want to know if he agrees with it or not. Or maybe: 'It's my cousin's birthday and I want to buy him a CD, but his taste hasn't evolved since the 80's. Any suggestions?' Or maybe your friend just got a three-legged cat and you need a name for it."

Within the first 60 seconds of your conversation, Strauss says, immediately mention that you have some kind of time constraint, whether or not you do.

The trick when you're flirting, Strauss says, is "figuring how to keep a balance between being engaging enough to retain someone's attention and not seeming overly available." Tease him a little and call him out by saying something like, "Oh sure you do..."

Flirt for the sake of flirting. "If you meet a high-quality guy and you're really attached to the idea of him being your boyfriend, that pressure -- that neediness -- is something he'll sense," Strauss warns.

Make it about you, not about him. "If it seems like you're trying too hard, whatever you're doing will come across as desperate," Strauss says. His advice? "Think: 'I'm fun. I'm cool. I radiate charisma, I am free to do whatever I want.' The most important thing to remember while you're doing all this flirting is to make it fun for yourself, because then it will be fun for the other person."