Option 1: You can select a topic which you are familiar with, or curious about.
Option 2: Browse searching the SocINDEX. By trying different keyword/topic searching, you will see what topics/articles come up most and what other researchers were writing about. You can, then, choose the topic, in which you are most interested.
Why you should use scholarly/peer review articles, not magazine articles:
Topic formulation and analysis from descriptive phrases and keywords identification.