It's also important to change your password and admin username if someone will help you with your blog and needs your password and admin username to login to do the work. After all the work is complete, admin username and your password changes. If the person is trustworthy, someone in their company might not be. Better to be safe than sorry!
I back my blogs using a free plugin WP DB Backup up. If anything happens I can always restore my website. I use my site to be scanned by WP Security Scan plugin and WordPress Firewall to block asks to rename your login url to secure your wordpress website.
No software system is resistant to vulnerabilities and bugs. Security holes will be found and men will do their best to exploit them. Keeping your software up-to-date is a fantastic way once security holes are found because their products will be fixed by software vendors that are reliable.
Exclude pages - This plugin provides a checkbox,"include this page in menus", which can be checked by default. If you uncheck it, the page won't appear in any listings of webpages (which contains, and is usually limited to, your webpage navigation menus).
Now we are getting into matters. You Check This Out must rename it to config.php and alter the document config-sample.php, when you install WordPress. You will need to set up the database facts there.
Don't use wp_ as a prefix for your own databases. Web hosting providers are currently eliminating that default but if yours doesn't, adjust wp_ to anything but that.