MJ: Don't let culture trivialize your life and work and relationships. Don't hang out only with people who are drinking the 30-is-the-new-20 kool-aid. I cannot tell you how many emails I have received from 30somethings since The Defining Decade came out, ones in which the writer says something like, "I used to roll my eyes at my peers who were determined to meet benchmarks-graduate school, real relationships, decent-paying jobs that reflect their interests-on time or early. Now I'm envious and admiring of them. Now I'm working twice as hard for half the result." Don't shrug your shoulders and say, "I'm in my 20s. What I'm doing doesn't count." Recognize that what you do, and what you don't do, will have an enormous impact across years and even generations. You're deciding your life right now.

BT: As a clinical psychologist, what advice do you have for coping with emotions like anxiety which inevitably arise during times of economic uncertainty?

MJ: Given that life and the brain change so much across our 20s, this is the perfect time to learn new coping strategies. It's not okay to go to work with scars on your arms from cutting, it's not acceptable to scream at friends when things go wrong, and live-in girlfriends get tired of seeing us stoned every night. These are the years to learn to calm yourself down. Gain some control over your emotions. Sure, there's Xanax, which a recent conference presenter I heard only half-jokingly called "Jack Daniels in a Pill." But practice calming techniques that can work over the long run: exercise, therapy, mindfulness, yoga, cognitive meditation, deep breathing, healthy distraction, dialectical behavior therapy. Use your rational mind to counter the anxious and catastrophic thoughts you have: "I probably won't be fired because I dropped one phone call." Try to create your own certainty by making healthy choices and commitments that off-set the upheaval in the world around.

BT: We loved this quote: "Claiming a career and getting a good job isn't the end, it's the beginning." Can you explain this a bit?

MJ: Most 20somethings are terrified of being pinned down. They're afraid that if they choose a career or a job, they are closing off their other options and somehow their freedom will be gone and their lives will be over. In fact, getting a good job is the beginning. It's the beginning of not hating that question, "What do you do?" It's the beginning of having something on your resume that might help you get that next job you want even more. It's the beginning of not overdrawing your bank account because of a flat tire. It's the beginning of feeling like you could actually think about dating since your time isn't taken up working those three part-time jobs you have in order to avoid a "real job." Research shows that getting going in the work world is the beginning of feeling happier, more confident, competent, and emotionally stable in adulthood.

BT: Can you discuss some of the current neurobiological research, and how that impacted your writing?

MJ: By now probably everyone has heard that the teen brain is not fully developed and that the frontal lobe-the part of the brain where we plan for the future and tackle questions that don't have black-and-white answers-does not reach full "maturity" until sometime during our 20s.

Unfortunately, this fact about the late-maturing frontal lobe has been interpreted as a directive for 20somethings to wait around for their brains to grow up. The real take-home message about the still-developing 20something brain is that whatever it is you want to change about yourself, now is the easiest time to change it. Is your 20something job, or hobby, making you smarter? Are your 20something relationships improving your personality or are they reinforcing old patterns and teaching bad habits?

What you do everyday is wiring you to be the adult you will be. That's one reason I love working with 20somethings: They are so darn easy to help because they-and their brains and their lives-can change so quickly and so profoundly.