Why everyone should use Time Machine

Time Machine allows you to make regular backups of your computer system on an external hard drive. Today I was cleaning out some old music files in iTunes that I no longer wished to have, and accidentally deleted the wrong songs; not realizing until after I emptied the Trash. I went into my Time Machine backup and restored the entire iTunes folder to a backup that was done two hours prior (I could have backed up to an hour, but I wanted to be extra sure everything would be fine). This is a good reason for everyone to keep regular backups, whether it be automatically with Time Machine, or manually on your own.