For search engine optimization, having a large number of links into your site from qualified sites (sites Google trusts) is very important. Reciprocal links don’t work as well as those one-way links coming in from good sites. Here’s a good trick to find your incoming links. It doesn’t work too well in Google (the link command is broken there), but you can do it in http://www.yahoo.com. Probably the same links will be in Google.

In Yahoo, enter the following in the search box, replaceing yoururl with your domain name:

link:http://www.yoururl.xxx

This will return both the external and internal links for your site; i.e., it will also show pages linking into the home page.

To get ONLY the external links to the site, use:

link:http://www.yoururl.xxx -site:yoururl.xxx

To get the listing of links to any page of your site:
linkdomain:www.yoururl.xxx
(no http:// this time!)
and only the external links to any page of your site:
linkdomain:www.yoururl.xxx -site:yoururl.xxx