Google Operators you should know

1. check your site indexation: site:xxxx.com

2. check backlinks: link:xxxx.com
note: result page only shows samples links, not all of them. to find all backlinks, you have to log in webmaster.

3. check your site indexation in main index: site:xxx.com -allinurls:xxx.com

4. diagnose your site: http://www.google.com/safebrowsing/diagnostic?site=http://www.xxxx.com

5. site status: http://hvys.xxx.com.
note: if pr is 7, your site is just fine; pr is 4, banned; pr is 0, penalized. all of those is not officially confirmed.

6. search forums: inurl:forum keyword

7. search posts: intitle:forum keyword