SeoMoz is The most influential site about Seo. What are The best sites for keyword advertising, web analytics and email marketing?

If I can only pick 1 for each: Web Analytics: Avinash Kaushik's Occam's Razor http://www.kaushik.net/avinash/ Keyword Advertising (PPC): PPC Hero http://www.ppchero.com/ Email Marketing: The MailChimp Blog http://blog.mailchimp.com/

Here's an awesome starting place for finding good blogs on specific marketing topics: http://adage.com/power150/. You can find pretty much everything you are looking for, as blogs are ranked according to their influence in specific marketing categories.

Wordstream - http://www.wordstream.com/blog writes about SEO and PPC Kissmetrics - http://blog.kissmetrics.com/ Writes about Web Analytics and Internet Marketing in General (I'm a big fan of Avinash as well) Vero - http://blog.getvero.com/  Are Email Marketing Pros

For PPC/Keyword advertising I've found these two resources: http://raventools.com/blog/21-ppc-articles-to-bookmark-now/ http://certifiedknowledge.org/blog/ For webanalytics: http://www.kaushik.net/avinash/advanced-analytics-visitor-segments-engagement-social-media-search-long-tail/ http://www.kaushik.net/avinash/beginners-guide-web-data-analysis-ten-steps-tips-best-practices/ http://www.advanced-web-metrics.com/blog/2008/11/03/tracking-social-networks-with-google-analytics-using-filters/ http://www.advanced-web-metrics.com/blog/2009/12/09/how-to-choose-between-advanced-segments-versus-profile-filters-in-google-analytics/ http://mashable.com/2011/05/23/how-to-use-google-analytics/ http://www.socialmediaexaminer.com/google-analytics-custom-campaigns/ For email marketing: http://www.marketingsherpa.com/ Hubspot has some pretty good articles on all of these categories as well I hope these help.

For email marketing: Retail Email Blog: http://www.retailemailblog.com/ Mediapost Email Insider columns: http://www.mediapost.com/publications/email-insider/#axzz2JSlsaFBm Emailcritic: http://emailcritic.com/ Email fail: http://emailfail.posterous.com/ Deliverability http://blog.deliverability.com/ http://getintheinbox.com/ http://www.spamresource.com/ http://www.spamtacular.com/ Design http://stylecampaign.com/blog/ http://www.emaildesignreview.com/ http://www.beautiful-email-newsletters.com/http://newsletter-examples.com/ Also, there's http://emailblog.eu disclaimer: that's my personal blog on email marketing (news, insights, design et al).

Keyword Advertising & Digital Marketing in General Search Engine Land & Search Engine Watch http://searchengineland.com/ http://searchenginewatch.com/