Songwriting
Most people who learn theory are really trying to write better songs. These six pages are about that directly: what makes a fragment stick, where energy goes in a song, and how to finish one.
From Idea to Finished Song.
It names the four ways into a song and what each one tends to break. Worth reading before you write rather than after you get stuck.
Jump straight in
The idea
The craft
Keep going
The other sections
Everything on this site sits in one of these, in the order they are meant to be learned.
The building blocks
How music works