Here are a few links to resources we have found useful (feel free to recommend more):

YouTube’s Creator’s Playbook:

• http://www.youtube.com/yt/playbook/

Digital Assets:

• http://www.digitaljuice.com/
  
• http://www.pond5.com/

Industry News:

• http://www.tubefilter.com/
• http://gigaom.com/