The rename your login url to secure your wordpress website Codex has an outline of what permissions are acceptable. Directory and file permissions can be changed either via an FTP client or within the page from the web host.
The stronger approach, and the one I recommend, is to use one of the password creation and storage plugins available on your browser. Lots of people like RoboForm, but I think after a free trial period, you have to pay reference for it. I use the free version of Lastpass, and I recommend it for those of you who use Firefox or Internet Explorer. That will generate passwords for you.
Maintain control of your online assets - Nothing is worse than having your livelihood in from this source the hands of someone else. Why take chances with something as important as your website?
Safety plug-ins that were all-Rounder can be thought of as a complete security checker. They provide you with information about the weaknesses of the website and scan and check the website.
These are a few. Great thing is they don't need much time to do. These are also options, which can be carried read the article out.