INTRODUCTION
http://dynamobim.org/qa-about-dynamo/
https://www.youtube.com/watch?v=0yyBte2M4rA - includes some Excel tasks
OFFICIAL PRIMER
TUTORIALS
Collection of links to tutorial pre April 2015
http://therevitkid.blogspot.com.au/2015/04/marcellos-dynamo-bim-tutorial-list.html
GITHUB
Home of Dynamo (it is Open Source, not owned by AutoCAD)
https://github.com/DynamoDS/Dynamo
LIST NODES
http://plevit1.blogspot.co.uk/2015/01/examples-for-all-list-actions-in-dynamo.html
REVIT API as NODES
https://github.com/DynamoDS/Dynamo/wiki/Python-0.6.3-to-0.7.x-Migration