Feel free to peruse some of the cool tools below to help you get the best out of your SEO campaign...
PPC ROI Calculator - use this tool to see how cost effective your PPC campaign really is! This will also tell you your actual conversion rate which you can use to calculate your maximum bid amount for your next campaign.
PPC Maximum Bid Calculator - use this tool to see how cost effective your PPC campaign really is!
SEOmoz - one of the most widely respected sources of internet marketing and they have some fantastic free tools available.
Microsoft Demographics - this predicts the potential demographic breakdown of internet searchers by either keyword phrase, or URL.
Google Trends - this interesting application by google lets you take a look at search trends by geographic region and by year.
Google Pulse Rank Check - rank pulse checks the search rankings of 1000 keywords within the google network to keep track of what's hot in internet searches.
Redirect check - have you set up re-directs within your website? Are you sure they're all working? Double check your URL to see whether your site is directing traffic as it should be.
Google Insights for Search - great tool for comparing search volume patterns.