Pagespeed recommendations for the Website Optimization.

PageSpeed

• Avoid a character set in the meta tag
• Avoid bad requests
• Avoid CSS @import
• Avoid CSS expressions (deprecated)
• Avoid document.write
• Avoid Flash on mobile webpages (deprecated)
• Avoid landing page redirects
• Avoid Plugins
• Combine external CSS (deprecated)
• Combine external JavaScript (deprecated)
• Combine images using CSS sprites
• Defer loading of JavaScript (deprecated)
• Defer parsing of JavaScript
• Enable gzip compression
• Enable Keep-Alive
• Improve server response time
• Inline small CSS
• Inline small JavaScript
• Leverage browser caching
• Leverage proxy caching (deprecated)
• Make landing page redirects cacheable (deprecated)
• Minify CSS
• Minify HTML
• Minify JavaScript
• Minimize cookie size (deprecated)
• Minimize DNS lookups (deprecated)
• Minimize redirects
• Minimize request size
• Optimize images
• Optimize the order of styles and scripts
• Parallelize downloads across hostnames (deprecated)
• Prefer asynchronous resources
• Put CSS in the document head
• Remove query strings from static resources
• Remove unused CSS
• Serve resources from a consistent URL
• Serve scaled images
• Serve static content from a cookieless domain
• Specify a cache validator
• Specify a character set early
• Specify a Vary: Accept-Encoding header
• Specify a viewport for mobile browsers
• Specify image dimensions
• Use an application cache
• Use efficient CSS selectors