Business Intelligence (BI)

http://www.web-analytics.es/blog/3-elementos-clave-que-debes-conocer-en-business-intelligence/

Google Website Optimizer

http://blog.kissmetrics.com/guide-google-website-optimizer/
http://searchengineland.com/how-to-segment-google-website-optimizer-tests-33341
http://www.grokdotcom.com/2007/04/03/64-tips-for-getting-started-with-google-optimizer/
http://www.blastam.com/blog/index.php/2009/03/top-50-google-website-optimizer-tips-on-what-to-test/

Texturas Photoshop

http://www.smashingmagazine.com/2014/07/03/creating-custom-textures-photoshop-techniques/

http://www.webdesignerdepot.com/2014/07/free-download-100-repeating-vector-patterns-from-freepik-com/

Cheatsheet

http://www.emezeta.com/articulos/emezeta-card-modrewrite-cheat-sheet

http://www.emezeta.com/articulos/emezeta-card-php-cheat-sheet

http://www.emezeta.com/articulos/css3-cheatsheet-chuleta-css

Woocommerce

http://www.1stwebdesigner.com/tutorials/using-woocommerce/