One of the plus that Microsoft have with Dynamics AX or any other product is its existing product stack. The integration of Microsoft Office Suite aids Microsoft Dynamics AX to be more interactive and integrated in users existing environment.
Microsoft Dynamics AX 2009 also provides integration with Office Communicator. This enables the presence of a person/contact to be shown as part of the contact information, along with links to contact that person. Where the eBook provides several of the coding tips and tricks, Greg on Dynamics AX describes this in a few easy steps. Follow this article for further implementation details.
Also, you can find link to the list of best practices errors and warning messages in Dynamics AX here.