Examples of stories - http://www.captaindebug.com/2013/06/so-whats-in-story.html

Introduction to story point - http://blog.anandvishwanath.in/2011/03/questioning-story-points.html

Imperative vs Declarative Scenarios in User Stories - http://benmabey.com/2008/05/19/imperative-vs-declarative-scenarios-in-user-stories.html

Turn good story to great
1. Get your story right
2. The unwritten rule of what goes inside
3. Choose your words carefully
4. Use acronyms sparingly
5. Convention over OVER-complication

 - http://jcwong.wordpress.com/2011/08/08/turning-stories-from-good-to-great/

Checklist for user story - http://marjoriepries.blogspot.com.au/2013/01/a-checklist-for-effective-user-stories.html

See the picture in your backlog. - http://winnipegagilist.blogspot.ca/2012/03/how-to-create-user-story-map.html

INVEST mnemonic to describe the characteristics of good stories:

    Independent: the stories can be delivered in any order
    Negotiable: the details of what's in the story are co-created by the programmers and customer during development.
    Valuable: the functionality is seen as valuable by the customers or users of the software.
    Estimable: the programmers can come up with a reasonable estimate for building the story
    Small: stories should be built in a small amount of time, usually a matter of person-days. Certainly you should be able to build several stories within one iteration.
    Testable: you should be able to write tests to verify the software for this story works correctly.

http://martinfowler.com/bliki/UserStory.html

Story Mania, User Incognito, Disastrous Details, Story Handoff, Criteria Crisis - http://www.romanpichler.com/blog/user-stories/5-common-user-story-mistakes/ 

Define Motivations, Don't Define Implementation - http://alanklement.blogspot.de/2013/09/replacing-user-story-with-job-story.html

Why large team is not suitable to use user story to collect requirement - http://accelerateddevelopment.blogspot.hk/2014/07/user-stories-dont-work-for-most.html

How to split stories - http://gojko.net/2012/01/23/splitting-user-stories-the-hamburger-method/

Visually mapping story to backlog - https://www.thoughtworks.com/insights/blog/story-mapping-visual-way-building-product-backlog