Remove your unused CSS designations and compress your CSS file. CSS Drive Gallery has a great CSS compression tool, set it to normal and keep comments. I was able to shave 12% off the size of the file using their tool.
Install the Use Google Libraries plugin if your sites or plugins are utilizing AJAX libraries. WordPress includes these libraries with their default installation but the files are not compressed and extremely bloated. By using this plugin, the compressed file is utilized and typically cached from Google.
Step through your theme files and remove unnecessary spaces and empty lines from your code. Each of those characters takes up space unnecessarily.
See if your hosting company has gzip compression enabled on your account. I found that both of the different hosting companies did not have it enabled. Compression can add additional load on your server, but typically results in overall improvements in page load time. Don’t underestimate compression, take a look at the difference in Google Webmasters when I turned compression on:
There are many more articles at Google on how to improve your site’s performance – be sure to read through the many articles and speed up your site. Your search engine ranking may depend on it!
About Douglas Karr
Douglas Karr is the founder of The Marketing Technology Blog. Doug is President and CEO of DK New Media, an online marketing company specializing in inbound marketing leveraging social media, blogging, search engine optimization, pay per click and public relations. Their clients include Angie's List, Mindjet, Webtrends, ChaCha and many more. Douglas is also the author of Corporate Blogging for Dummies. If you're interested in having Douglas speak, please propose an event!