15. Ignoring image optimization
One of the worst mistakes we all make is often forgetting to optimize images, while publishing an article. Specially, beginners don’t care at all about it. If you want to make your WordPress site load faster, then make image optimization your first priority.
Using HD images can have a tremendous impact on your site speed, while optimized images can improve the overall performance of your site in a dramatic way. So don’t forget to optimize images before uploading them to your WordPress site.
Guest author: Ajeet is a professional web developer, associated with the web development company SeoSemanticXHTML,
Read more at http://www.jeffbullas.com/2014/04/14/the-15-most-common-wordpress-mistakes-to-avoid/#0bwir6fhJUfddPBR.99