SEO for drupal
1. Enable Clean URLs
2. Enable Path Module and install and enable Pathauto, Global Redirect and Token Modules.
3. Configure the Pathauto Module
4. Install and enable the Meta Tags Module.
5. Install enable the Page Title Module
6. Do NOT install the Drupal Sitemap Module.
7. Fix .htaccess to redirect to “www” or remove the “www” subdomain.
8. Fix your theme’s HTML headers if they aren’t right
9. Recommended: create a custom front page
10. Modify your robots.txt file.
source: http://tips.webdesign10.com/basic-drupal-seo-on-site-optimization
