The 1946 yearbook contained pictures of first cousins of two of my grandparents and the pictures of at least two other relatives. If you know your family member graduated from high school, check out the local paper around the time of the graduation. While not in large daily papers, smaller papers continue this tradition. The students' listed aspirations may provide new insight into a family member. Of course, newspapers are rarely indexed, and the researcher will have to know the year the individual graduated from high school.
Some colleges occasionally publish alumni rosters.
Rosters from 20 or 30 years ago can be an excellent way to obtain a more recent address for a family member or friend. I was at the University of Illinois for a conference recently and spent my spare time in the university's library. While browsing the reference collection, I noted a recent alumni directory. I pulled it from the shelf and looked for the missing student. Sure enough, there was an address for him.