Yslow recommendations for webpage optimizations

1. YSlow
2. Add Expires headers
3. Avoid AlphaImageLoader filter
4. Avoid CSS expressions
5. Avoid empty src or href
6. Avoid HTTP 404 (Not Found) error
7. Avoid URL redirects
8. Compress components with gzip
9. Configure entity tags (ETags)
10. Do not scale images in HTML
11. Make AJAX cacheable
12. Make favicon small and cacheable
13. Make fewer HTTP requests
14. Make JavaScript and CSS external
15. Minify JavaScript and CSS
16. Put CSS at the top
17. Put JavaScript at bottom
18. Reduce cookie size
19. Reduce DNS lookups
20. Reduce the number of DOM elements
21. Remove duplicate JavaScript and CSS
22. Use a Content Delivery Network (CDN)
23. Use cookie-free domains
24. Use GET for AJAX requests