Quite often when you are working in Revit, you are modelling based upon existing information. Be that a topographical survey or measured survey of an existing building, etc. The typical workflow is to bring in the existing information into your Revit Project and use that as a template to create your model.
Tutorials
Autodesk Revit: Zooming in on Schedules
In this video I show you how to zoom in on specific data cells within your Revit Schedules. This makes it far easier to work on large Schedules without losing your place!