Jimmy Reed Shuffle in E
This is a great place to start. A straight-ahead shuffle with the bass walking from the Root, or 1st degree, to the Sixth degree: Root - Third - Fifth - Sixth etc., and the drummer shuffling on the snare & ride symbol.
Great songs like Jimmy Reed's "Baby What You Want Me To Do" are classic examples and mandatory for a Bluesman and any well rounded musician's repertoire. This groove is sometimes called a “Delta Shuffle”.