Sitecore Quick Reference

Tips and Tricks
http://oshyn.com/sitecore-tips-and-tricks-vol-ii

Authoring tool
http://www.marketingtechnologyinsights.com/2013/06/9-sitecore-tips-tricks-content-editor.html

John West
http://www.sitecore.net/learn/blogs/technical-blogs/john-west-sitecore-blog/posts/2012/04/professional-sitecore-development-chapter-11-sitecore-best-practices-tips-and-tricks.aspx

http://www.sitecore.net/learn/blogs/technical-blogs/john-west-sitecore-blog/posts/2010/07/ten-things-you-did-not-know-you-could-do-with-sitecore.aspx

https://sitecoreaustralia.wordpress.com/2010/06/16/top-100-cool-things-in-sitecore-completed-list/

http://fes-sitecore.blogspot.com.au/

http://fes-sitecore.blogspot.com.au/2015/03/giving-content-editors-control-over.html#more