While 21st century approaches to public health have increasingly focused on healthy living with diet, exercise, smoking cessation, and access to preventive health care, there is a growing evidence base to incorporate mental health into our nation's public health agenda.

We often sacrifice sleep because of long workdays that spill over into our "leisure time," because we're watching late-night TV, and sometimes because that is the only time that we have to ourselves after we put the kids to bed.

Americans spend billions each and every year to educate their minds. From preschool through graduate degrees, we are a nation obsessed with learning. Except, that is, if it's about ourselves.

In contrast to discussion about mental disorders, I think we've neglected its flip side: What constitutes psychological health in today's world?