Check out the plugins talked in this video here:
Yoast SEO: https://wordpress.org/plugins/wordpress-seo/
Wordfence Security: https://wordpress.org/plugins/wordfence/
WP Smush it: https://wordpress.org/plugins/wp-smushit/
Check out the Inner Geek website for other great content: http://www.innergeekdesigns.com/
"Hey It's Bill And Mike, Grab Your 101 Free WordPress Plugins Below"