Missouri Star Quilt Co has video tutorials for using charm packs and other per-cut sizes.

It has been a long time since I made that quilt so dont remember the details.
I did not use packs of charms but made my own from fabric. It is not a scappy quilt.
I am thinking about making one from charm packs.
I always buy charm packs in threes since one pack will not make much but maybe a table runner.