I back my blogs frequently using a free plugin WP DB Backup up. If anything happens I can always restore my website. I use WP Security Scan free plugin to scan my blog and requests to be blocked by WordPress Firewall to fix wordpress malware cleanup.
I protect an access to important files on the site's server by placing an index.html file in the particular directory, that hides the files from public view.
You first need to create a new user with administrator rights before you can delete the default admin account. To do this go to your WordPress Dashboard and click on User -> Create New User. my explanation Then enter all of the information you will need to enter.
You can my latest blog post get an SSL Encyption Security for your WordPress blogs. The SSL Security makes secure and encrypted communications with your site. So that all transactions are listed, you can keep history of communication and the all the cookies. Make sure all your sites get SSL security for maximum protection.
There is another problem you have with WordPress. People always know they could just visit with your login form and where they can login and try out a different combination of passwords address and user accounts. In order to prevent this from happening you need to install Login Lockdown. It's a plugin that lets users attempt and login with a password three times. Following that the IP address will be banned from the server for a specific timeframe.