Page speed recommendations for Website Optimization.

1. PageSpeed
2. Avoid a character set in the meta tag
3. Avoid bad requests
4. Avoid CSS @import
5. Avoid CSS expressions (deprecated)
6. Avoid document.write
7. Avoid Flash on mobile webpages (deprecated)
8. Avoid landing page redirects
9. Avoid Plugins
10. Combine external CSS (deprecated)
11. Combine external JavaScript (deprecated)
12. Combine images using CSS sprites
13. Defer loading of JavaScript (deprecated)
14. Defer parsing of JavaScript
15. Enable gzip compression
16. Enable Keep-Alive
17. Improve server response time
18. Inline small CSS
19. Inline small JavaScript
20. Leverage browser caching
21. Leverage proxy caching (deprecated)
22. Make landing page redirects cacheable (deprecated)
23. Minify CSS
24. Minify HTML
25. Minify JavaScript
26. Minimize cookie size (deprecated)
27. Minimize DNS lookups (deprecated)
28. Minimize redirects
29. Minimize request size
30. Optimize images
31. Optimize the order of styles and scripts
32. Parallelize downloads across hostnames (deprecated)
33. Prefer asynchronous resources
34. Put CSS in the document head
35. Remove query strings from static resources
36. Remove unused CSS
37. Serve resources from a consistent URL
38. Serve scaled images
39. Serve static content from a cookieless domain
40. Specify a cache validator
41. Specify a character set early
42. Specify a Vary: Accept-Encoding header
43. Specify a viewport for mobile browsers
44. Specify image dimensions
45. Use an application cache
46. Use efficient CSS selectors