I mainly translated the t-shirt sizes to grain sizes (<XS --> Colloid, XS --> Clay, S --> Silt, M --> Sand, L --> Gravel, XL --> Cobble, >XL --> Boulder).
Fits well with the sand/rocks in a glass jar productivity analogy that everyone likes to use
An executive coach uses rocks, pebbles, and sand to explain time management to new CEOs
Cory likes to just get the hard, executable work done first thing in the morning before the brain has any chance to say no.
Delay icky task → Deadline nears → Get it Done → Review task/project, have 'gross' realization the task result or outcome was not nearly as icky as the feeling fuelling the initial delay. This is Pressfield's 'The Resistence' at work and I don't (never will) have answers as to why and how it works.
“If it’s your job to eat a frog, it’s best to do it First Thing in the Morning. And if it’s your job to eat two frogs, it’s best to eat the BIGGEST one first.” — Mark Twain
Good research
Eat The Frogs First Thing in The Morning (And Other Better Work Habits)
Eat That Frog: Brian Tracy Explains the Truth About Frogs | Brian...
What Is Eat the Frog? A Dead Simple System for Productivity Minimalists