What are the competitor's actions?

[fasisi]

Hello,

How can I know what the competitor does in his/her internet marketing? Like what social forums he/she visit, what are his/her advertisements, where his/her back links come from?

Thank you

[fasisi]

Are there another ways other than Alexa?

[Sandy2089]

Just visit Yahoo explorer and look at the places where your competitors left links and do it yourself. Analyze carefully the competitor's site.

[MikeF421]

Even better, use Market Samurai.

You can see their backlinks, the anchor text used, and the PageRank of the site the backlink is coming from.

[JJarden]

SEOBook.com has free tools you can use with lots of links to other free tools. I would start there. I like to use quantcast.com and also SEMRush.

[billdotd]

Take a look at Spyfu (http://www.spyfoo.com/).