A good basic article about of two of the four major backup problems I commonly see:
1) Not having backups at all
2) Not having transaction log backups at all (unlimited log file growth)
3) Not cleaning up after your backups (unlimited backup size growth)
4) Not restoring your backups as a test
4a) Not doing PITR restores as a test
I'd at least put a note about T-Log backups in your article; many accidental DBA's overlook the absolute necessity of the for Full and Bulk-Logged recovery model databases.