SharePoint GUIDs

A GUID is a Globally Unique Identifier.
Here is how you find your SharePoint list or view GUID:
The easiest way is to go to the list's default view (SP2010) and hover over the "Add Document"/Add New Item" link on the bottom of the page. In the browser status bar you'll see the URL for that link. That URL contains the bare GUID for the list.

http://yoursite/_layouts/Upload.aspx?List={EFG33460-E1F4-4E78-A2F8-CDEG5BE0420B}&RootFolder=

Your GUID is in curly brackets: {EFG33460-E1F4-4E78-A2F8-CDEG5BE0420B}

If you don't have that link to click on, you can go to the list settings, copy the URL and see the GUID in its HTML encoded form in the "List" querystring variable (List=listGUID):

http://yoursite/_layouts/listedit.aspx?List=%7BEFG33460%2DE1F4%2D4E78%2DA2F8%2DCDEG5BE0420B%7D

It takes 5 seconds to manually transform this to a valid GUID. %7B = "{", %7D = "}", and %2D = "-".

List=%7BEFG33460%2DE1F4%2D4E78%2DA2F8%2DCDEG5BE0420B%7D

becomes

List={EFG33460-E1F4-4E78-A2F8-CDEG5BE0420B}

You can get your "view" GUID this way:
Go to the list settings, scroll all the way down to the views, and get the URL from your view (right-click "copy shortcut" or just click on it and copy the page URL). The view GUID is stored in its HTML encoded form in the "View" querystring variable (View=viewGUID). You can then manually decode that using the same logic as described above.

http://yoursite/_layouts/ViewEdit.aspx?List=%7B1637E544%2D5183%2D417B%2DB9DC%2DCD0E2E4EDEE1%7D&View=%7B7E510143%2DD7EA%2D4CFD%2D9A4D%2D65FF5AE909CC%7D&Source=

So.... This

View=%7B7E510143%2DD7EA%2D4CFD%2D9A4D%2D65FF5AE909CC%7D

becomes

View={7E510143-D7EA-4CFD-9A4D-65FF5AE909CC}