Tips for WordPress Developers

1. Make use of wp_enqueue_script function for your scripts & styles
wp_enqueue_script function allows you to load a script or a library and ensures that you load one copy only.
2. Cache your stuff
Transients API allow you to store options for a short amount of time. You can cache an entire query on it. If your site is updated once a day, you can set a transient expiring every 12h or even less.
4.you should know your feeds
Here are some good feeds that you can use:
• Main – yoursite.com/feed
• Main comments – yoursite.com/comments/feed
• Post comments – yoursite.com/post-name/feed
• Categories– yoursite.com/category/yourcategoryname/feed
5. Optimize your DB every once in a while
You can optimize your MySQL tables using a plugin or manually to reduce DB size and make sure all the queries are working.

6. Know that there is a plugin for almost everything you might be looking for
You can always improve your site using plugins, such as CSS and JS minifying plugins, caching plugins, DB optimization plugins, etc..