Get the GUID for a SharePoint List or View

The GUID is a 128 Bit (16 Bytes) unique number like {936DA01F-9ABD-4D9D-80C7-02AF85C822A8} and identifies Microsoft documents, but also Lists and Views.
Here is how to retrieve the GUID (Global Unique Identifier) of a Sharepoint List or View.

SharePoint Lesson #2: How to get the GUID from Peter Heffner