Rachel Simmons

Intrinsic motivation is one of learning's most precious resources. It bolsters us to stick out the tough moments of a challenge and pursue what we love to do.

If the Internet has been called a great democratizer, perhaps what social media has done is let anyone enter the beauty pageant. Teens can cover up pimples, whiten teeth, and even airbrush with the swipe of a finger, curating their own image to become prettier, thinner, and hotter.

Self-compassion encourages mindfulness, or noticing your feelings without judgment; self-kindness, or talking to yourself in a soothing way; and common humanity, or thinking about how others might be suffering similarly.

Having a baby on my own is a dream come true, but in my world, there's no sheepish spouse on his way home from a work trip to offer me a stretch of alone time.

There are no shortcuts to genuine friendship. Relationships are built over time.

Despite girls' sparkling resumes — including rates of college enrollment and high school grades that outstrip boys — sexism is a barrier that still leaves girls ambivalent about power. Opening doors has not amounted to ambition to lead for many of them, even those with options, networks, and resources.

Failing well is a skill. Letting girls do it gives them critical practice coping with a negative experience. It also gives them the opportunity to develop a kind of confidence and resilience that can only be forged in times of challenge.

Sometimes comparing can be a good thing: it can inspire us to work harder and reach farther. But for the most part, excessive measuring yourself up against others — especially when it becomes a way to put yourself down — is a colossal waste of time. It's a dead end. It won't make you do anything except feel horrible.

A healthy friendship is one where you share your true feelings without fearing the end of the relationship. It's also one where you sometimes have to let things that bug you slide. The tough moments will make you wiser about yourself and each other. They will also make you stronger and closer as friends.

Somebody once told me I treated my smart phone like Wilson, the volleyball Tom Hanks turns into a friend when he's stranded on a desert island in that movie 'Castaway.' It's an apt comparison: parenting a toddler occasionally feels like being marooned, and your phone is your only connection to the rest of the world.

If you want to stand with me as a single mom — and I know so many of my friends and colleagues do — please don't appropriate my burden as a way to validate your own. To suggest that you are single-parenting when you are simply solo for the weekend devalues what real single mothers do.

Social media forces girls to bear witness to painful realities of relationship that were previously hidden from view. It is a new kind of TMI, or 'too much information': publicly posted photographs of an outing or party you did not attend, or a personal web page like Formspring, can send a girl into paroxysms of anxiety and grief.

There are times in every friendship when you or your friend are too busy to call or are more focused on other relationships. It will hurt, but it's rarely personal. Making it personal usually makes things worse, and being too clingy or demanding can drive a friend even further away. Like people, friendships can get 'overworked' and need to rest.

Most parents would not hesitate to assume responsibility for their child's behavior on a playground, at school, or in someone else's home. What happens online should be no different. Parents should talk with their children about computer ethics, stipulate rules of conduct, and — most importantly — establish consequences.