It's a great surprise that many webmasters run their sites/blogs without daily backups. Often, when the unexpected happens, these webmasters have nothing to blame but their carelessness.

But what could go wrong?

1. Your site could be hacked
2. Your host's servers may crash
3. An installed plugin/ theme may cause things to take a worse dimension

Are backup plugins expensive? No! While some are premium, the greatest of them are all free. Amongst them:

1. BackUpWordPress
2. XCloner and
3. WP Complete Backup

The great thing about these backup plugins is that they are free and back up both files and database! In the event of a crash, hack or anomaly, you lose virtually nothing. Not even a comment.

Check out this post to see which one suits your particular needs - and remember to backup daily!: http://notopoverty.com/free-wordpress-backup-plugins/