Thinking

First principles means stripping a problem back to what is physically or economically true and rebuilding from there. It is expensive to do and most decisions do not deserve it. It earns its keep when everyone around you is copying each other and the copied answer is wrong.

Inversion asks what would guarantee failure, then avoids that. It is far more reliable than asking what would produce success, because failure modes are fewer and more concrete. Most of my useful planning is inversion wearing a different name.

The eighty-twenty split is the one everyone quotes and almost nobody applies, because applying it means deleting things that are genuinely working a little. Cutting ten lead sources that produced under five percent of results between them was harder than it should have been, and cost nothing.

Second-order thinking asks what happens after the thing you want happens. Circle of competence is knowing where your judgement is actually better than average. For me that meant turning down work in a field I could have faked. Leverage is output that does not scale with hours. Compounding is the reason boring consistency beats intensity. Opportunity cost is the real price of everything, and the only one that never appears on an invoice.

A model that has never changed a decision is trivia. Learn fewer, apply them harder.

The point of a playbook is that the thinking happens before the situation, not during it. In the moment you are tired, or angry, or being watched, and none of those improve judgement. Deciding in advance is the whole mechanism.

Chaos is when too much is happening at once. The response is to narrow to one thing and finish it, because the cost of chaos is not the volume, it is the switching. Conflict is when someone is pushing. The response is a short flat statement with no explanation attached, because explanations invite negotiation.

Creation is when the work is open-ended and there is no external pressure. The response is to start badly and on purpose, because a bad first version is the only reliable way past a blank page. Self-doubt is when the internal case against you sounds convincing. The response is to check whether anything in the last week is actual evidence, which it usually is not.

Temptation is when the short-term self is arguing with the long-term one. The response is to change the environment rather than to win the argument, because the argument is not winnable at the moment it starts.

Decide the response before the situation. In the moment you are the worst version of the decider.

Most decisions do not need a process. The ones that do are reversible-but-expensive, or irreversible-and-cheap-looking, and the second category is where the damage lives. The framework is deliberately boring. What is the case for. What is the case against. What does this look like from outside my own head. Who would tell me I am wrong, and have I asked them.

The advisor check is the one that does real work. Not because the advice is better, but because explaining a decision out loud exposes the parts you were skipping. Half the time the decision resolves before the other person answers.

The other half of this is a split between three kinds of work. Maker work needs long uninterrupted blocks and produces the actual output. Manager work is coordination and runs on shorter cycles. Personal work is everything that is only yours to do. Treating all three as one undifferentiated to-do list is why days disappear without anything being finished.

The failure mode I return to most is deciding something twice. If a decision keeps reopening, it was never actually made, and the cost is not the second decision. It is every hour spent re-litigating it in the background.

If a decision keeps reopening it was never made. The cost is the re-litigating, not the choice.

This one sounds stranger than it is. Four characters, each standing for a mode I can switch into deliberately. The value is not the character. It is that a named mode is easier to reach for than an abstract instruction like be more analytical.

The strategist mode is long-horizon and patient, willing to sit on information until it is useful. The diagnostician mode is aggressive about the actual cause and refuses the comfortable explanation. It is deliberately unpleasant to be around, because politeness is what lets a wrong diagnosis survive.

The disciplined mode is the one that does the unglamorous work when nobody is watching and there is no external reward. The ascender mode treats capability as something built in increments rather than something you have or lack.

Each has a shadow. The strategist becomes detached and stops acting. The diagnostician becomes contemptuous. The disciplined one becomes rigid. The ascender becomes obsessed with progress for its own sake. Knowing the shadow is most of the value — it tells you when a mode has stopped serving and started running the show.

Every mode has a shadow. Knowing which one you are running is the point, not which one is best.