If relevant, include an xml sitemap index, which lists the location for a blog sitemap perhaps generated by WordPress, the main sitemap & a video sitemap (this would be a lower maintenance method, as the blog sitemap would be automatically updated).
Link XML sitemap (or XML sitemap index) from the robots.txt file.
Verify with Google Webmaster tools (for both www. and non www. versions of the site, and any subdomains).
Verify with Bing Webmaster tools.
Link blogger profile pages up with the bloggers’ Google plus page.
Ensure all your bloggers have a Google Plus profile.
Keep CSS in a separate file & minify.
Use image sprites for template images that are used across the site.
Ensure images are all compressed – Smushit lets you compress a batch of images in folder a structure.
Ensure images have alt text.
Use a content delivery network (CDN) for images/media – this can be a subdomain or Amazon cdn for example.
Specify your height and width for images.
Enable gzip compression.
Create an error page with user friendly message, navigation, search box.