I don't, as my mom would say, sweat the small stuff in our relationship. Because when I think of day-to-day irritations that you might have with the one you love, they're nothing compared to the bigger task at hand.

People have notions of what a wife's role should be in this process, and it's been a traditional one of blind adoration. My model is a little different - I think most real marriages are.

Celebrating the holidays in the White House over these past eight years has been a true privilege. We've been able to welcome over half a million guests... our outstanding pastry chefs have baked 200,000 holiday cookies... and Barack [Obama] has treated the American people to countless dad jokes.

It's all about patience and persistence - you often have to expose a child to a new food numerous times before he or she will begin to like it. So keep trying!

See, that's why Barack's running: to end the war in Iraq responsibly - to build an economy that lifts every family, to make sure health care is available for every American - and to make sure that every child in this nation has a world-class education all the way from preschool to college.

We should always have three friends in our lives-one who walks ahead who we look up to and follow; one who walks beside us, who is with us every step of our journey; and then, one who we reach back for and bring along after we've cleared the way.

Let Girls Learn issue has always been personal for me. I grew up in a working-class neighborhood on the South Side of Chicago where most folks, including my parents, didn't have college degrees. But with a lot of hard work - and a lot of financial aid - I had the chance to attend Princeton and Harvard Law School, and that gave me the confidence to pursue my ambitions.