20 Best Practices for Speeding up Your Website

1.    Make fewer HTTP requests
•    Use CSS Image Sprites & Image Maps
•    Combine multiple script/css files into one
•    Use inline embedded images in the HTML

2.    Use a CDN
3.    Add an Expires or a Cache-Control Header
4.    Gzip components
5.    Put stylesheets at the top & scripts at the bottom
6.    Make JavaScript and CSS external
7.    Reduce DNS lookups
8.    Minify JavaScript, CSS and HTML
9.    Avoid Redirects
10.    Make Ajax cacheable
11.    Remove duplicate scripts
12.    Configure ETags
13.    Use GET for AJAX Requests
14.    Post-load Components
15.    Preload Components
16.    Reduce the Number of DOM Elements and events
17.    Split Components Across Domains
18.    Minimize the Number of iframes
19.    Optimize Images
20.    Keep Components under 25K