Important Links

Please find few important links, which really can help in moving AX 2009 to AX 2012:

Upgrade to Microsoft Dynamics AX 2012 [AX 2012]
http://technet.microsoft.com/en-us/library/dd362002

Issues with AX 2012 with TFS
https://community.dynamics.com/ax/b/daxmusings/archive/2011/11/17/ax-2012-and-tfs.aspx

Models, Layers, and the Model Store [AX 2012]
http://technet.microsoft.com/en-us/library/hh335184.aspx

Data Upgrade Scripts for Microsoft Dynamics AX 2012
http://msdn.microsoft.com/en-us/library/30eee91e-6b1d-44ce-8cac-b6a6e89bc954(v=ax.60).aspx

Install the Microsoft Dynamics AX databases [AX 2012]
http://technet.microsoft.com/en-us/library/ee355075.aspx

How to: Create a Repository [AX 2012]
http://msdn.microsoft.com/en-us/library/aa851066.aspx

How to: Add Filter Controls to a Simple List Form [AX 2012]
http://msdn.microsoft.com/EN-US/library/hh745335.aspx

What's New: Visual Studio Tools for Developers in Microsoft Dynamics AX 2012 [AX 2012]
http://msdn.microsoft.com/en-us/library/gg863931.aspx#BKMKMgdCodeBusLogic

Database Upgrade from Older version to AX 2012
http://blogs.msdn.com/b/axsupport/archive/2011/12/11/planning-your-data-upgrade-to-microsoft-dynamics-ax-2012.aspx

AX & TFS FAQ
https://community.dynamics.com/ax/b/daxmusings/archive/2011/06/29/ax-amp-tfs-faq.aspx
http://daxmusings.codecrib.com/2011/06/ax-tfs-faq.html

TFS workspaces in AX2012
http://dev.goshoom.net/en/2012/07/tfs-workspaces-in-ax2012/

Shared vs. isolated Dynamics AX environments
http://dev.goshoom.net/en/2012/06/shared-vs-isolated-ax/