Developing SharePoint Applications (patterns & practices)

Download SharePoint Guidance (Aug 2009): http://www.microsoft.com/downloads/details.aspx?FamilyId=91f3c22c-8be7-4721-9449-84f699337d55&displaylang=en Summary of this download is available at: http://msdn.microsoft.com/en-us/library/dd203468.aspx