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Safeguard your login credentials - Do not keep your login credentials where a hacker might locate them. Store them offsite, and even offline. Roboform is very good for protecting them, too. Food for thought!
Keep control of your online assets - Nothing is worse than having your livelihood in the hands of somebody else. Why take chances with something as important as your site?
Black and whitelists phrases based on which field they appear inside, in a page request. (unknown/numeric parameters vs. known article bodies, remark bodies, etc.).
Using a plugin for WordPress find more info security makes great sense. WordPress backups will need to be performed on a regular basis. Don't become a victim of not being proactive about your 16, look these up as a result!