Try to draw the title of your magazine out of this overarching theme. Note that most magazines have one- or two-word titles (such as TIME, National Geographic, Seventeen, Rolling Stone, and Forbes). Not only can a short title sum up your theme nicely, it's also easier to deal with from a design standpoint.
What’s the focus of this one publication? How can you use it to tie all your content together? (It’s not for nothing that a single publication of a magazine is called an “issue.”)
A good example of themed issues are the prom editions of teen magazines, or the Swimsuit Issue of Sports Illustrated. All of the content inside that issue ties back to the primary focus.
What’s the title of this issue? If necessary, what’s the title of the entire series?
Annual examples of titling an issue include the Swimsuit Issue of Sports Illustrated, the Hollywood Issue of Vanity Fair, and the September Issue of Vogue.