Newspaper articles and online media like blogs and can be the best connection between your topic and how it relates directly to Memphis. Dig through these using microfilm on McWherter's 2nd floor (old-school!), using Google's site tool, or using the links below.
Find the password to the Commercial Appeal and Memphis Business Journal websites on the library's password wiki
These cover a wide variety of topics targeted towards a general audience. They will have something on everything, though some topics might not be covered in depth.
These sources have a specific focus or beat that they cover. They will provide in-depth news in some topics and nothing in others.