You can buy security plugins for your WordPress blog. There are safety plugins out there that promises security for your own blog. One is called fix wordpress malware Scan. This plugin continuously scans the system . So that hackers can not penetrate the system, it also updates the safety.
Strong passwords - Do your best to use a strong password, alpha-numeric, with upper and lower case and special characters. Easy to remember passwords are easy to guess!
For me it's a WordPress plugin. They are drop dead easy to set up, have all the features you need for a task such as this, and are relatively inexpensive, especially when compared to having to hire someone to have this done for you.
Another step to take to make WordPress more secure is to upgrade WordPress. The reason behind this is that with every upgrade there also come fixes for security holes making it essential to upgrade early.
Do your homework and some hunting, but read review if you are pressed for time and want to get this done check these guys out once and for all, try the WordPress security plugin that I use. It is a relief to know that my website (and business!) are secure.