Serena's always been one of the best, and she will forever be one of the best tennis players in women's tennis.

I think my biggest thing is learning when to hit which serve when, not doing the exact same thing over and over. Because O.K., great, it's 120 miles per hour, but they're standing right there, and they just block it back.

It's one of those things where eventually in your career, it kind of switches from being the young up-and-comer to someone who has had results and the other person is trying to raise their level to play. I think it's a privilege.

Setting a goal, accomplishing it, and feeling good about yourself can help build confidence and perseverance.

I cried like a baby. When no one could see me or hear me. Not because I feared what cancer would do, but because I didn't want the disease. I wanted my life to be normal, which it could no longer be.

Power breaking,' also called Hanmadang - which means something like celebration or festival in Korean - involves breaking large amounts of wood, concrete, granite, and the like with specific hand and foot techniques. Practitioners rely on repeated resistance training and the idea that, over time, the body can adapt to stress.

My mom was a nurse, and my dad worked in the Health Ministry as a civil servant. When I was 6 years old, my dad got a job at the Sri Lankan High Commission in Canada, so we moved there.

We have by far the most expensive health system in the world. We spend 50 percent more per person than the next most costly nation. Americans spend more on health care than housing or food.