Reading the Scrum Development mailing list is always a good for some inspiration. Today there was some discussion on how to split user stories. Next to some good examples in the mailthread, Charles Bradley also provided a link to Patterns for Splitting User Stories by Richard Lawrence.
That blog post provides some very good guidelines on different ways to split-up user stories. I was also happy to see that he also finds that usually going above 8-13 points is a good indicator that a story needs to be split. The different ways to split stories may in some cases seem obvious, but not all of them are, and it’s very good to read such a complete list.