I back my blogs using a plugin WP DB Backup up. I can restore my blog to the last settings if anything happens. I use WP Security Scan plugin to scan my blog and asks to be blocked by WordPress Firewall to how to fix hacked wordpress.
There are ways to pull off this, and a lot involve copying and FTPing files, exporting and re-establishing databases and more. Some of these are very complex, so it is imperative that you select the one that is right. Then you might want to look into using a plugin for WordPress backups, if you're not of the technical persuasion.
Keeping your WordPress he has a good point website up-to-date is one of the most easy things you can do. For the past couple of versions, WordPress has included the ability to install updates. A new upgrade becomes available.
Can you view that folder, Imagine if you go to WP-Content/plugins? If so, Visit Your URL upload that blank Index.html file inside that folder as well so people can not view what plugins you might have. Someone can use this to get access because even if your version of WordPress is up to date, if you're using a plugin or an old plugin using a security hole.
There are always going to be risks being online (or even just being alive!) And it's easy to get caught up in the fear. We put the breaks on, As soon as we get caught up in the panic. This isn't a good response. Just take some common sense precautions forge ahead. If something does happen, it will need to be addressed then and no amount of quaking in your will have helped. All is good, if look at here nothing does and you have not made yourself sick with worry.