Chord Progression Hints
Some hints are explained in more depth at Borrowed Chords Explained by How To Write Songs
Change where the tonic chord is:
Change the quality of any chord:
Connect chords together from above or below:
Change any dominant 7 chord (e.g., E7) using a tritone substitution:
Use chromatic mediants (more on chromatic mediants):
Use secondary dominants (more on secondary dominants):
Use augmented chords for leading lines, changing keys, and for connecting chords.
  1. Leading lines
    • C, C+ | C6, C+
    • C, C+ | C6, C7 | F, Fm | C
    • Am, G#+ | C/G, F#m7b5 | Fmaj7
    • Cmaj7, C7 | C6, C+ | C, C+ | Dm7 G7
  2. Changing keys
    • C, C+ | C6, C7 | F, Gm, C | F
    • C, E+ | A, Am | E
    • C, G#+ | C#, C#m | G#
  3. Connecting chords
    • C, C+ | Am, F | C, G
    • C, C+ | Dm, G7+ | C
Use half diminished chords as a substitute for dominant chords, for connecting chords, and more.
Take one of the 5 remaining scale notes and make that the root of a new chord:
  1. D major has 7 notes: D, E, F#, G, A, B, C#
  2. There are 5 remaining notes: D#, F, G#, A#, C
  3. Choose one of those remaining notes: G#
  4. Make a progression: (D, F#m, A, G#7)