This is fascinating. Breaking work down by quarter is a cool way to do it. I have often done that with writing music, where the concert season is April -- Nov, for performing and honing new songs when it's warm; and then recording albums in Dec/Jan when it's quiet and cold.

P.S. 4 tendencies is a favorite of mine. I saw Gretchen live once and her comment about my type (rebel) was "I don't follow anyone's rules, not even my own"