This list of websites will vastly improve your ranking potential:

OvertureKeyword- Type your keywords, watch the search volume.
GoogleRankings- Pulls you’re positioning from Google, Yahoo, and MSN.
YahooTracker- Sign up, see your rankings daily for 25 search strings.
APLUS- Wonderful hosting and more free tools than you’ll know what to do with.
PRChecker- Analyze any page rank for any web page.
SEOChat- SEO 101, explains everything that shows up in your browser.
EngineSeeker- Comprehensive web empire construction.
WebMasterWorld- Every internet topic is explained (very useful forum).
RealEstateWebmasters- Our world under one "roof."
MarketLeap- Research any websites link pop/search engine saturation.