Answers: • It is advantageous if your web server supports the If-Modified-Since HTTP header • If using dynamic pages, it helps to keep the parameters short and the number of them few • Avoid using robots.txt to prevent crawling of search results pages or other auto-generated pages, even if they don't add much value for users coming from search engines • Submitting new pages of your website at http://www.google.com/addurl.html as soon as they are online, helps to speed up indexing