Videos: Oprah's Lifeclass

Pastor Rick Warren says society defines success as looking good, feeling good and having the goods. The problem, he says, is this "good" life isn't good enough. Find out how to start living the better life, a life of significance.

Since Dr. Gary Chapman's best-selling book The 5 Love Languages was first published more than 20 years ago, millions have discovered which love language they speak. Now, it's Oprah's turn! Watch as she takes Dr. Chapman's quiz for the first time.

Oprah talks about love with Dr. Gary Chapman, a marriage and family expert and author of the New York Times best-selling book The 5 Love Languages: The Secret to Love That Lasts. Plus, get the secret to jump-starting your Valentine's Day.

Many years ago, Oprah says, Dr. Phil gave an 'Oprah Show' guest advice that Oprah never forgot: "You don't have to worry about trusting other people if you can trust yourself." Now, Dr. Phil counsels Keri, a woman who says she had her heart broken by a man who manipulated her. Find out why Keri says she missed the warning signs that her boyfriend was a BAITER.

If you've ever met someone who made the hairs on the back of your neck stand on end, take note: Dr. Phil says bad guys, or BAITERs, possess certain qualities that should spark suspicion. Watch as he goes through the Nefarious 15, methods by which these individuals worm their way into your life.

How do you spot a BAITER before he or she infiltrates your life? Dr. Phil reveals the Evil 8, his comprehensive list of red flags. Plus, he warns against meddling in friends' unhealthy relationships and explains why life is a game.

For years, Mandisa says, she's tried to be nice to her mean-girl friends, but they continue to put her down and call her names. Watch as Dr. Phil offers advice to Mandisa on breaking free from these toxic relationships. Plus, find out how Mandisa can take back her power by giving herself permission to be her own best friend.

Cutting ties with a toxic friend, family member or partner is easier said than done. Dr. Phil stresses the importance of trusting your instincts about the people in your life. If you're tempted to reunite with an old flame, Dr. Phil has some advice for you. Find out if you miss your ex or if you're missing the person you wish he or she had been.

Parents know best...or do they? Watch as Dr. Phil, author of the best-selling book 'Life Code,' explains how the world has evolved since he was a boy and shares ways to prepare yourself, and your children, for the challenges that lie ahead.

Oprah and Dr. Phil join together to uncover how to spot and stop the bad guys in your life, using principles from Dr. Phil's new book, 'Life Code: The New Rules for Winning in the Real World.'

Oprah and Pastor Rick Warren help viewers answer life's biggest questions: What on earth am I here for? What is my purpose? They also talk about the three levels of existence: Survival, Success and Significance.

The title of Pastor Rick Warren's best-selling book The Purpose Driven Life was no accident. Find out why he says everyone's life is driven by something, and why if you live for the approval of others, you will die by their rejection.

Kelly Hurliman, Oprah's personal stylist, says she's passionate about 'The 5 Love Languages,' a book written by marriage and family expert Dr. Gary Chapman. Watch as Kelly shares how discovering her husband's primary love language, acts of service, improved their marriage.

Pastor Rick Warren, author of The Purpose Driven Life, says there are two common reasons people do not fulfill their purpose. Watch to find out what they are.

Pastor Rick Warren believes everyone lives at three levels in life: Survival, Success and Significance. Only when you reach the highest level, Significance, are you living your life with purpose. Watch as Pastor Warren explains why America is filled with too many people getting by at the Survival level.