SEO Tip # 49) you can use Google adsense for earning money on your site, but don't think by using adsense your site will not get better rank, even Google.
SEO Tip # 50) Try to avoid to use the meta refresh tag to redirect users. Because you could be banned. If you set up a redirect that goes to a new domain, you need to write it as a 301 HTTP redirect, not a 302 or meta refresh. This tells the search engine that this redirect is permanent and they should change to the new domain in their directory.
SEO Tip # 51) Never Link invisible images (1x1 Pixels) & Do not Hide your text - your site will be banned.
SEO Tip # 52) Register your domain name for a long time that search engines trust that you are not for a one year and you plan to be around for a long time or tell that you are serious about your website or business.
SEO Tip # 53) Ensure your outgoing links are going to quality on topic sites.
SEO Tip # 54) For Meta description: WORDS ....
A) Google : 160 characters
Fore More SEO Tips