Another easy-but-so-good-it-makes-me-queasy segment (was that a stretch? nah!) is to look for visits that performed some key action on your site that you have tracked through your event variables. All you do is add the segment to your definition and change the criteria to "exists". This will then include any visit that triggered 1 or more of these events. See Link 1 for details.

RELATED: Link 1