Install the fix hacked wordpress Firewall Plugin. This plugin investigates requests with simple WordPress-particular heuristics to identify and stop attacks that are most obvious.
Use strong passwords - Do your best to use a password, alpha-numeric, with upper and lower case and special characters. Easy to remember passwords are also easy to guess!
It's a WordPress plugin. They are drop dead easy to set up, have all the functions you need navigate to this site for a job like this, and are relatively inexpensive, especially when compared to having to hire someone to get this done for you.
BACK UP your website and keep a copy on your computer and off-site storage. Back if you have a site that is very active. You spend a lot of time and money on your site, do not skip this! Is BackupBuddy, no other plug-ins back up you can find out more database, widgets, plugins and your files. Need to move your site this will do it in under a few minutes!
Keep in mind that the safety of your blogs linked here depend on how you handle them. Be certain that you follow these tips that are basic to avoid hacks and exploits on your own blogs and sites.