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Common Mistakes

Some mistakes are so common they look like the normal way of doing things — until you pay for them. This collection covers errors people repeat for years: in money, relationships, health, and paperwork, and the simple ways to stop making them.

Career

Apply Even If You Don't Meet 100% of the Requirements

Most job postings describe an ideal candidate, not a minimum threshold -- don't screen yourself out.

12
Career

Negotiating Your First Raise Is Scary — Do It Anyway

Asking for a raise feels uncomfortable, but staying silent guarantees you will be paid less than you are worth for longer than you should.

15
Thinking

Being Able to Spot Flaws in Others' Reasoning Doesn't Make You Immune

Spotting others' biases is easy; seeing your own requires a fundamentally different skill.

10
Thinking

Naming a Bias Does Not Remove It

Knowing about a bias does not protect you from it — you still need active systems to counteract blind spots.

7
Thinking

A Bad Process Can Produce a Good Outcome — That Doesn't Make It a Good Process

Judge decisions by their process, not their outcome — luck is not a strategy.

20
Thinking

If Someone Keeps Moving the Target, They Were Never Planning to Be Convinced

When every answered objection spawns a new one, the person was never open to being convinced.

5
Thinking

"It's Natural" Doesn't Mean It's Good

Natural is a description of origin, not a certificate of quality.

22
Thinking

Your Memory Rewrites the Past to Match What You Believe Now

Memory reconstructs rather than replays — your current beliefs quietly reshape what you remember.

23
Thinking

Your Most Recent Experience Is Not the Most Important One

Recency bias makes the latest event dominate your thinking — older data is often more representative.

7
Thinking

Big Failures Are Made of Small Compromises

Disasters accumulate through small, reasonable-seeming compromises.

17
Thinking

Do Not Mistake a Label for an Explanation

A label describes the pattern; an explanation reveals why it exists.

12
Thinking

Reading About Clear Thinking Is Not the Same as Thinking Clearly

Knowing about biases and actually avoiding them are different skills entirely.

5
Thinking

"If We Allow This, Everything Will Collapse" Is Rarely True

One change rarely triggers an unstoppable chain reaction — each step has its own decision point.

12
Career

Do Not Vent at Work to People You Do Not Trust

Vent only to people you genuinely trust -- the wrong audience can turn a fleeting frustration into lasting damage.

11
Relationships

Attacking the Person Instead of Discussing the Action

Attacking someone's character shuts down conversation; addressing specific behavior opens the door to change.

11
Relationships

Hoping Someone Will Fundamentally Change After Marriage

Marriage amplifies who someone already is -- marry the person in front of you, not the version you're hoping for.

12
Health

Taking Supplements Without Testing Is Shooting in the Dark

Get a blood test before taking supplements — without data, you're guessing and potentially doing more harm than good.

7
Time

Thinking That Switching From Laptop to Phone Counts as Rest

Switching from laptop to phone is not rest — your brain needs time with no screen at all to actually recover.

21