Extend your site's RSS feeds by including featured images in the feed.
Hide the Language Switcher on the default WordPress login screen.
Hide the Welcome Panel on the WordPress dashboard for all users.
Add the last updated date & time to your posts in the frontend.
Completely disable search on your WordPress website.
Add the page slug to the body class for better styling.
Wrap featured images in your theme in links to posts.
Make it easier to edit posts when viewing archives. Or on single pages. If you...
Force your users to login only using their username.
Update the length of the Excerpts on your website using this snippet.
Disable comments for all post types, in the admin and the frontend.
Customize the "Read More" text that shows up after excerpts.
Remove the Screen Options menu at the top of admin pages.
Force your authors to write posts that have a minimum length.
Prevent posts in certain categories from showing up in your RSS Feeds.