Wrote a Wordpress Plugin
WP Cron
Wrote PHP Code
Used SQL
WP Mail
Extended CRM
Improved business process
Automated a process
+6
Wrote a custom WordPress plugin that extends JetPackCRM functionality to email agents every day and remind them who they need to contact. Not publish-ready, but works very well on the site it's meant for! 

I used SQL queries, WP Cron, activation hooks, and wp_mail.