Ever had the network crash the day you were supposed to send out a job, leaving you unable to pull a Revit license? The feelings of helplessness and anger at the system are shared by many. This can be avoided with some planning. A day or two before the deadline, copy the project folder onto your desktop. Keep this updated as you continue to save your work onto the server. In the event of a server crash, you're still up and running with your project files. At the same time, open Revit and go to Help-Product and License Information. Click the button that says "Borrow" beside the network license. A calendar will open up asking you to select a date to borrow a license until. Select the day after your project deadline. You now will have a borrowed license on your computer till that day. After that day, the license will automatically return itself to the server.
Let the network die, server crash, whatever. You'll still have your files and be able to work in Revit (though you might have some issues printing and emailing).