30 Lessons for Loving collates the relationship advice of hundreds of couples who have stayed together into old age, and will teach you how to have happiness and longevity in your love life.

What does it take to find the right partner? And once you've done that, how do you keep your love alive for many years?

Family sociologist and aging expert Karl Pillemer has studied numerous long-term marriages.

Speaking with over 700 Americans who had been together for 30 years or more, Pillemer discovered the secrets to life-long love.