Use of Geographic Information Systems to display data can tell a compelling story about your customers, visitors, and the associations between them that you might not have been able to see without a map.
Dashboards are a great way to capture a great deal of information in one capsulized picture. More information is usually behind each element on the dashboard but good dashboards give you a sense of things without going any further.
Taking a moment to look at data differently than the usual presentation will often reveal a new point of view.
Using Spreadsheets to highlight relevant details will help keep you on track.
Using a wide variety of graphics to allow the picture to form can provide understanding between seemingly unrelated pieces of data.
The more specific you can look at data, the more distinctions can be made about the subject. You can always aggregate data. It is much more difficult to take it apart.