By default on WordPress the administrator level user is set to ‘admin’. Everyone knows this and they also know that not everyone bothers to change it. If someone was targeting your site and wanted to get in, this is where they would start.
Change the ‘admin’ user level to subscriber level and create a new user with administrator access. Also don’t post anything under an administrator account to further limit people’s ability to guess your administrator username.
How To – In you WordPress dashboard look on the left for Users. First add a new user. You will have to create a username, password and give an email address. Set this one to administrator.
Then log out and re log in using the new administrator user you just created.
Go to Users again and change the access level for the ‘admin’ user to subscriber.