Abi:
Try to experiment with chord movement and tensions.
Example:
Tonic (1) is stable and resolved,
Subdominant (4) is not very stable, can choose to resolve or not resolve,
Dominant (5) chords are highly unstable and must be resolved.
Know the characteristics and functions of different chords. Like in the key of "C", a G7 will definitely resolve to a Cmaj7, an Fmaj7 can remain at the end point or it can also resolve to a Cmaj7. An Em7 may revolve to Am7 or move on to Fmaj7, Am7 may remain or resolve back to C. There is a deeper reason why a
subtonic (2),
Dominant (5) will definitely resolve to a
Tonic (1).
For this, you have to look at how individual chord tones have moved to resolve to the next. Example ... from Dm7 to G7. Dm7=D,F,A,C. G7=G,B,D,F. In this progression, D and F are the common notes .... whereas A moved down to G and C moved down to B. That's why the transition between Dm7 and G7 i so smooth .... because of the movement of notes.
There are many other combination of chords Like
Flatten 5th, #11th, 6th, etc where it is
highly unstable and desperately needs to resolve ... but these chords are also very exciting because jazz musicians loves highly unstable chords when they can play very interesting sounds over ie the
melodic minor. But these chords always serves a function in a progression and to know how to use them, we need to understand them.
Hence, the study of Chord substitutions, chord tensions, melodic patterns and progressions can really help in terms of compositions.The reason for knwoing all these is not because we want to undermine creativity. But chords theory is based on centuries of experience from our predeccesors to tell us how to define what we hear.
But ultimately .... we don't wanna end up in a mass production of music. Songs should ultimately still comes from the heart and soul. These are tools where we could learn. I believe Bernini didn't just learn how to make sculptures the moment he is born. He must have the vision and had learnt the right technics to do so.
Well on the other hand .... I'm not sure is Curt Kobain or Dimebag Darrrel had learnt all these before they compose. I guess it depends on Genre. Dun wish to sound like an expert .... i believe what i say here, most of you might already have known ... just sharing ... have fun and rock on!!