The hands and the outcomes here are illustrative. They use only general, public-domain principles (keep what connects, shed what is isolated) and are not drawn from any year's official card.
Your ledger
Two numbers that are supposed to drift apart. The gap between them is the whole lesson.
Play a few rounds and this line will write itself.
Four habits this drill is built on
The mental game is not willpower. It is bookkeeping.
Judge the decision, not the reveal
You can only ever choose well or badly with the information you had at the time. What comes off the wall afterwards is not information you had. Scoring yourself on the outcome is like grading a decision on evidence that arrived after you made it.
A good call that lost is noise, not feedback
This is the one players get wrong most often. You cut the right tile and still drew badly, so you conclude the cut was wrong and change your approach. You just let a coin flip rewrite a sound method. The fix is to count these, not to react to them.
A bad call that won is the dangerous one
When you keep an isolated tile and it works out, your brain files the mistake as a success. That is how a weak habit gets reinforced, because it paid. Luck that rewards a poor decision teaches you the wrong lesson twice: once when it happens, and again every time you repeat it.
Keep the ledger away from the table
The work happens after the game, not during it. Write down the calls you were sure about and check them later. Over a season this does two things: it shows you how much of the game is variance, and it stops one bad night from talking you out of a method that works.