Mental Algorithms Cheatsheet

Game-changing thought tools you can run in your head in seconds.

Decision-Making

Expected Value (EV) Thinking

A quick mental calculation to assess an action's potential upside against its likelihood of success. It's not about precise math, but assigning rough scores to value and probability (EV = Value × Probability) to avoid low-yield activities and prioritize high-potential ones.

0–1: skip

1–3: maybe

3–6: likely worth it

6–10: priority

Regret Minimisation Frame

Ask: “Will I regret not doing this in 1 year?”
If the answer is “yes” or even “maybe” → do it. Good for career moves, convos, trips, risks.

The 10/10/10 Rule

Ask:
Will this matter in 10 minutes?
In 10 months?
In 10 years?
Snaps you out of reactive thinking. Useful for emotional moments, tough choices, or pettiness.

Time-to-Impact Ratio

Ask: _“How long will this take?” vs. “How long will it matter?”

E.g. Tidying your desk: 5 mins → might impact 5 hours of focus

10-min message → might lead to a big opportunity

Do more of the high-impact, low-effort ones.

Inverse Effort Sorting

Look at your to-do list. Pick the item that:
→ Has the highest value per minute of effort.
Start there. It’s like greedy sorting for ROI.

“Would I pay to avoid this later?”

If yes → just do it now.
Use this for admin, cleaning, calling your broadband provider, etc.

Social & Emotional

Status Reversal Test

“Would I act differently if I were the highest-status person here?”
If yes → you’re shrinking. Unshrink. Speak. Ask. Joke. Be the version of you that doesn’t care who’s watching.

5-Second Friend Filter

“If I met them today, would I want them in my life?”
Use this on old friends, clients, groups. If it’s a no — start detaching. Cuts dead weight.

Default to Generosity

When in doubt:

→ Give credit

→ Make the compliment

→ Offer help

99% upside, near-zero downside. You build social capital effortlessly.

Assume Misunderstanding, Not Malice

Small daily superpower. Keeps your relationships clean and your cortisol low.

The Ben Franklin Effect

Ask for a small, easy-to-grant favor. People subconsciously justify helping by deciding they like you, which strengthens the social bond. It's a counter-intuitive way to build rapport.

Curiosity Over Judgment

When you hear an opinion you disagree with, default to asking "Why?" or "Tell me more" instead of arguing. It de-escalates conflict and opens dialogue, even if you don't change your mind.

Creative & Personal Growth

The Boredom/Scary Compass

“Does this feel boring or scary?”
If boring → ditch or delegate.
If scary → probably the right direction.
It’s a compass for growth work vs. busywork.

What Would Future Me Thank Me For?

Let future-you be your creative director. Stops you playing small, especially when it’s easier to stall or compromise.

Ship It If You’re 80% Happy

Done > perfect. Publish the draft. Release the feature. Share the sketch. Feedback loops are worth more than polish.

When Stuck, Shrink the Scope

Too big? Too vague? Slice it.

Instead of “write the deck” → “write the 3 key headlines”

Instead of “start the app” → “get 1 API call working”

Scope until it’s laughably doable.

Set an Idea Quota

Aim for quantity, not quality. Try to come up with 10 ideas a day, no matter how bad. The pressure to be brilliant is lifted, and good ideas will emerge from the volume.

Steal Like an Artist

Don't just consume, analyze. Break down the work you admire to understand *why* it works. Then, combine and remix those elements into something new and uniquely yours.