When I was in college, one of my business instructors told us students that one of the greatest barriers to making money was procrastination.
I back my blogs regularly using a plugin WP DB Backup up. If anything happens I will always restore my website to the settings. I use WP Security Scan plugin that is free to scan my blog regularly and requests that are suspicious-looking to be blocked by WordPress Firewall to clean hacked wordpress site.
There are many ways to pull off this, and many involve copying and FTPing files, exporting and re-establishing much more and databases. Some of these are very complicated, so it is important that you select the one that is right. If you're not of the technical persuasion, then you may want to look into using a plugin for WordPress backups.
This is very useful click for info plugin, protecting you against brute-force strikes that are password-crack. It keeps track of the IP address of every login attempt. You can configure the plugin to disable login attempts for a range of IP addresses when a certain number of failed attempts is reached.
Now we are getting into things specific to WordPress. Whenever you install WordPress, you have to edit the file config-sample.php and rename it to config.php. You want to install the database details there.
Keep in mind the safety of your blogs depend on how you handle them. Make certain that you follow these basic strategies to prevent exploits and hacks on your own blogs and websites.