The WordPress Post Revision feature is very handy indeed! However, sometimes you can end up with a very large number of revisions taking up (unnecessary) space in your database and cause problems with renaming post-, category- and tag-slugs.

The functions.php file in every WordPress theme can contain many useful functions — everything from adding post thumbnail support to custom posttypes and your own taxonomies.

In this post I have collected a lot of functions that can help you customize your WordPress installation. Some are very useful, others are just nice workarounds of common challenges — some you might not even want to use.