g1smd - 11:55 am on Nov 20, 2012 (gmt 0) [edited by: g1smd at 1:02 pm (utc) on Nov 20, 2012]
Remember too that the canonical URL for the root of the domain should end with a trailing slash.
URLs for folders or the index page in a folder should end with a trailing slash.
URLs for the index page (either root or in a folder) should not include the index file name or the extension.
URLs for pages should not end with a trailing slash and the extension is optional.
Consider too that if parameters are in use, the order is important. This should always be the same.
When there are multiple possible URLs for the same content, Google appears to prefer the shortest one.
Additionally, in order of preference:
In particular use
[edited by: g1smd at 1:02 pm (utc) on Nov 20, 2012]