The common denominator that stuck out to me in these chapters was consistency. Whether in sociability or conscientiousness, those who lived a more stable, consistent life seemed to live longer. Friedman and Martin emphasize the importance of having a stable job, a stable marriage, and stable social life, all of which consistency plays a large role. We can make sense of this in reality: Someone who goes home to their partner every night instead of going out to bars, etc. will be less likely to contract diseases or get into an accident. As college students, most of us would also agree to the importance of a stable schedule, in that knowing what our next steps are (more or less) throughout the week result in less stress, more sleep, and a more regulated diet. I think most personality traits can be thought of with this consistency-centered thought process, in which someone who lives on a somewhat fixed schedule with stable relationships and habits is healthier in the long term.