Hair Therapy: Get Your New 'Do Rx

Complaint: You feel like someone's pushed the repeat indefinitely button on your daily schedule. Rx: Test-drive a short, shaggy bob, similar to Dianna Agron's new 'do. It's a fun look that has a lot of movement, says Eber. And it suits the person who likes very low-maintenance hair.

Complaint: You're up for a promotion at work, but so is another colleague who seems to always steal your thunder. Rx: Channel Mad Men's Joan Holloway (who's virtually impossible to ignore) with a new red-hued 'do. Go red, and your attitude will become more bold, says Eber. A great red is an attention-getter and shows you have confidence.

Complaint: The relationship is over. You hate him, hate your hair and wonder if you'll ever recover.Rx: Resist the urge to lop hair off for a Mia Farrow crop—a move you may regret. Instead, amp up the volume and length of your mane with extensions; they're just as appearance-altering, but without the scary commitment. Extensions can fulfill your fantasy 100 percent, says Eber. And they make you feel so, so feminine.

Complaint: You were mistaken for the mother of a young colleague while out at lunch—and now you're riddled with age-related insecurity. Rx: A classic low-slung side ponytail hints at youthfulness without being juvenile. There's a playfulness to the style, but it's also sophisticated, says Eber. The look also feels very French—a culture that understands how great beauties only get better with age.

Complaint: Your new job is decidedly un-corporate and staffed with intellectual hipsters who know their Prada from their Proenza. Rx: Fringe has its benefits—including making you feel like a fashion goddess. Heavy, more blunt bangs give you an instant trendiness, no matter what the actual trends are, says Eber. The person with those bangs knows exactly who she is. It's not about pretty. It's about making the statement of 'I'm fabulous.'

Complaint: It's only October, but already you're longing for the carefree days of summer. Rx: Classic long layers—a look Eber helped pioneer in the '70s—gives you the feeling of freedom. It's a wash-and-wear look, says Eber. For an added dose of sunniness, lighten up your locks with highlights around your face.

Complaint: Your new supervisor is the micromanaging type, and her constant hovering is cramping you style.Rx: Relegate your bad attitude to your mane with a top-heavy short crop that's inspired by punk rock street style. The look, which has been adopted by Ginnifer Goodwin and Evan Rachel Wood recently, is very hip, but will make you feel like you're rebelling, says Eber. And all without endangering your job.

Complaint: You like him. You really like him. But you're too shy to let him know.Rx: Harness the unfettered sex appeal of Brigitte Bardot with a '60s-inspired updo that's a little messy and a lot sexy. The kittenish look is for a woman who is daring and who likes attention, says Eber. And it's bound to lend you enough chutzpah to make that first move.