Make a plan. Look at what you're interested in. Get disciplined about something. Allow for the possibility that you have something important to contribute to the world and that the world would be a lesser place without that contribution.

You're not going to find something more valuable in your life than a committed relationship with someone that you love that sustains itself across time and that, in all likelihood, produces children. That's life.

I don't think it's unreasonable to point out that pursuing a career and a family is more difficult for women than it is for men.