Looking for a way to reduce the file size of your Revit project file (.rvt)?
The trick is to use the File-->Save As button. In the Options there is a checkbox called "Compact File". This won't drastically reduce the size but it will get rid of some "junk" that can bloat the file.
Step #1 - File-->Save As
Step #2 - Choose the Options button
Step #3 - Select "Compact File" and press OK then Save