7.14Harmonization is partly backward thinking

Suppose you know the phrase should end:

G7 → C

Now ask:

What can come before G7?

Often:

Dm

or:

F

So maybe:

Dm → G7 → C

What can come before Dm?

Maybe:

Am

So:

Am → Dm → G7 → C

This is often easier than harmonizing strictly left-to-right.

Start from the cadence and work backward.