I prefer using Plugins. Since i'm on Firefox there's a wide range of useful SEO plugins to choose from. Here's one that will help in analysis of you're competitors site : https://addons.mozilla.org/en-US/firefox/addon/9440
Alexa.com Compete.com using yahoo explorer and SEO For Firefox extension you can analyze competitor's website.
Hi there, You can use http://www.seo-forensics.com/, this is the best site I have ever seen in the web for competitors analysis. So all the best.
i want to know that by using this tool what will happened? I am newbie in this Waiting for master's answers