I want to feel like the things I did made a difference. That's one of the reasons I spend time greeting people on rope lines, because I'm always thinking, 'Maybe this interaction, particularly if I'm meeting kids, will change someone's life.' That's how I think about the work I do as First Lady. It's a rare spotlight. I want to make sure I don't waste it.

It's not about government telling people what to do. It's about each of us, in our own families, in our own communities, standing up and demanding more for our kids. And it's about companies like Walmart answering that call.

That's the advice I would give to women: Don't look at the bankbook or the title. Look at the heart. Look at the soul. Look at how the guy treats his mother and what he says about women. How he acts with children he doesn't know. And, more important, how does he treat you? When you're dating a man, you should always feel good. You should never feel less than. You should never doubt yourself.

Barack Obama was a black man that lived on the South Side of Chicago, who had his share of troubles catching cabs.

All we can do as women is make the best decisions for us. And that includes everything from how you look to how you dress to whether you choose to stay at home or work when you have kids. All those decisions are so personal, and we have to start with finding what brings us joy and what brings us our own individual confidence. And if we're feeling good with those choices, then it makes what everybody else has to say less important.

We've got a responsibility to live up to the legacy of those who came before us by doing all that we can to help those who come after us.

Barack and I were both raised by families who didn't have much in the way of money or material possessions but who had given us something far more valuable - their unconditional love, their unflinching sacrifice, and the chance to go places they had never imagined for themselves.