The document discusses 6 ways to backup SQL scripts, with 3 being unsuccessful and 3 being successful. Unsuccessful methods include using USB drives due to risk of loss or corruption, zip files which don't allow for version control, and numbering scripts locally which is prone to human error. Successful methods are source control via tools like GitHub which allows for versioning and collaboration, cloud drives like OneDrive which provide redundancy and accessibility, and email which provides an additional backup location. Resources for these methods are also provided.