Creating a custom WooCommerce email is not difficult as much of the code is shared for each core email. Let your imagination think of the possibilities for such additional emails.
I used post meta (in a unusual way) instead of transients as regenerating the data was too expensive. And I learned about fields=’ids’ in WP_Query.
Allow customers with a company view orders of other customers with the same company. Based on a query on boards.ie.
Debug WooCommerce without admin knowing (not in a bad way) – enable a payment gateway and redirect emails in code.
Simplify stock management by allowing wholesalers order online by using the Dynamic Pricing and User Role Editor plugins to give them discounts.
Hooks and filters are a core feature of WordPress and used extensively in WooCommerce. This post demonstrates changing the layout of the single product page by changing the hook execution order. Simple, but powerful.