I gotta go with backups as #1. As long as one has backed up, one can screw up a lot of stuff and not really have much to worry about. All it really costs is time.
Some elaboration is needed, I feel, on file management. What are some examples of good and bad file management?
Linux- Because you wouldn't buy a car with the hood welded shut, why should your O.S. be different?
“The highest glory of the American Revolution was this: It connected in one indissoluble bond, the principles of civil government with those of Christianity." -John Quincy Adams