SharePoint Permission Dependancies
A while back Hank Hooiveld posted some permission dependancy diagrams. If you are a SharePoint administrator or a developer who is manipulating site or list level permissions this diagram will be an invaluable tool to you.
It shows the dependancy of each permission. Without this one, you can’t have that one. Letting you know just what will happen to all the permissions of a user if you remove one permission for that user.