The National - Terrible Love. Radiohead - Karma Police. Talking Heads - Heaven. David Bowie - Ziggy Stardust. Pink Floyd - Shine on You Crazy Diamond (I do this in G, starting on Am, which I barre to make the transition to G# easier) Band of Horses - Funeral. The Work. To build a C7 chord, take a C major triad ( Example 1) and add the flatted seventh, Bb ( Example 2 ). Example 3 shows how to derive a C7 chord from an open-C shape—all you have to do is add your fourth finger to string 3, fret 3. Keep in mind that you don’t have to play all five strings. For example, just the bottom three notes of Nothing serious but you need to exercise holding of barre chords. Do changes of 5 barre chords (only two would do too) holding them for 20 seconds. Fo this excercises for 1 minute. Rest 1 minute and go it again. 10 excercises a day would do for few days. Then increase the time. In a week or so you'd be able to hold barre chords without pain. mHCl.