Wow! Here's a pretty major and very often overlooked issue with saving files in Revit that I recently realized many people aren't aware of...
If you work in an office (or even at home with a server of some sort) you have probably always saved your Revit files the way you always did with Autocad or any other program, in the project's file folder somewhere on a local server, right?
Why? Because you've probably noticed that once a project gets relatively large, say upwards of 20 Megs it gets really slow to save, it can take mutilple minutes, wasting your time, you may have even just decided that this was just one of the downsides to working with Revit's large files, it doesn't have to be!
If you save your file locally, like on your desktop even large files save fast! At the end of the day just upload the file manually to it's proper location and your fine. (Of course this is what you're doing already if you use worksets and are saving to central.)