Upon working on some important projects, you can configure Audacity to automatically save your progress at regular intervals.
Click on the Edit Menu > Preferences
In the window that opens scroll to the "Project" section
In the right pane in the "Autosave" section, next to "Auto Save Interval" select the appropriate number of minutes
Validate with the OK button.
Note that: This feature is to be used as a backup measure and it's recommended to leave the "Auto save copy of project in a seperate folder" option checked, in order to keep the integrity of the original project.