00:00 The introduction is one blues chorus with a sparse soloing guitar and organ. The drums and bass are playing a shuffle dance rhythm (each beat has a long-short rhythm). This introduction is a clear example of the melodic phrases of the blues. It begins with the first 4 bar phrase.
00:09 Second 2 bar phrase of the blues with a chord change. 
00:13 Third 2 bar phrase of the blues, return to the first chord.
00:17 Fourth 2 bar phrase of the blues, each bar has a new chord.
00:22 Final 2 bar phrase of the blues.  The horn section enters at the end of this first chorus to set up a return to beginning of the 12 bar form.
00:25 Vocal enters on a new chorus.
00:30 Notice the activity between vocal phrases.
00:51 Beginning of a new verse and a new twelve-bar chorus. Notice the activity in the organ behind the vocal.
01:16 Next chorus. Notice how the organ plays horn-like punches behind the vocal.
01:41 Next chorus. Notice the improvisational activity of the rhythm section during the fills. The organ improvisation continues during the vocals. Meanwhile, the horn section continues ensemble riffs creating the classic tight ensemble sound.
02:08 Next chorus.
02:16 The second phrase of this chorus is like all the others. It uses the title of the song.
02:32 The text moves to repeating Ive Got My Mojo Workin for the entire blues chorus.
02:57  The next chorus is the same with an increase in energy from the vocal as well as the band.
03:22 The texture intensifies even more with a call response (background vocals are added).
03:46 Everyone continues and the improvisation continues in the rhythm section.  The bass is relentless in its forward drive.
04:12 Last chorus.  Even though there is no new verses the blues often takes on a musical identity all of its own that offers the musicians a chance to improvise and build energy when the song itself is over.
04:21 Fade out begins.
04:35 End.
