The page allows a limit of 11 direct dependencies, and that limit has been exceeded.

http://social.msdn.microsoft.com/Forums/sharepoint/en-US/1002e7e0-69b8-4ce4-a3be-1ea52eda543d/user-controls-in-master-page-a-limit-has-been-reached

SharePoint Error: The security validation for this page is invalid

http://blogs.technet.com/b/meamcs/archive/2011/04/04/troubleshooting-sharepoint-error-the-security-validation-for-this-page-is-invalid.aspx
http://www.sharepoint-tips.com/2007/09/security-validation-for-this-page-is.html

Duplicate fields (columns) in custom content types in sharepoint 2010

http://www.scolts.com/Blog/Post/4/Removing-Duplicated-Field-Links-from-Content-Types

http://social.technet.microsoft.com/Forums/sharepoint/en-US/677e0174-d823-4d51-bd3a-208d37083e43/identical-duplicate-fields-in-content-type

Jquery date dropdown for mobiles

http://stackoverflow.com/questions/6132083/jquery-mobile-3-dropdown-datepicker

HTML characters

http://brucejohnson.ca/SpecialCharacters.html
http://ikreator.com/special-characters/ 

SharePoint 2010 get object type from URL

http://blogs.msdn.com/b/sanjaynarang/archive/2009/04/07/find-sharepoint-object-type-from-url.aspx

fix for sharepoint 2010 scrollbar not displayed issue

http://blog.creative-sharepoint.com/2012/02/sharepoint-2010-2-simple-steps-to-fixing-scrollbar-issue-in-google-chrome/

http://kyleschaeffer.com/sharepoint/sharepoint-2010-scrolling/

Add  !important to every style in the second post

Solutions file schema

http://blogit.create.pt/blogs/andrevala/archive/2008/02/17/SharePoint-2007-Deployment_3A00_-Creating-Solutions.aspx
http://geekswithblogs.net/SoYouKnow/archive/2010/02/16/rebuilding-a-.wsp-file-in-4-easy-steps.aspx 

Install sharepiont on windows 7

http://www.aartechnologies.co.uk/aar-technologies-web/share-point-2013/

save site as template

/_layouts/savetmpl.aspx