Forgetting to update your website (and a few security tips) Don't use "admin" as your WordPress user name (not the role) Use a less common password that is: Complex, Long and Unique (CLU) Password Resources https://1password.com/ https://www.lastpass.com/ https://keepass.info/ https://strongpasswordgenerator.com/ Having too many plugins Not creating a child theme when making changes Child Theme Genenator - https://wordpress.org/plugins/child-theme-generator/ Deleting content the wrong way and how it can create those dreaded 404 errors and make your SEO suck if you use redirects the wrong way Yoast SEO - https://yoast.com/wordpress/plugins/seo/ Not deleting the default content Sample Pages Hello Word