Awesome List of resources on Agile Software Development.
Best practices for Sprint Planning Meeting in Agile Project Management
How to Have an Effective Sprint Planning Scrum Meeting - by Luís Gonçalves
How to Run a Sprint Planning Meeting (the Way I Like It) - by Sandy Mamoli
Inside Atlassian: four steps to better sprint planning - by Dan Radigan
Scrum: 19 Sprint Planning Anti-Patterns - by Stefan Wolpers