Mental models can save your life.

But psychological biases can ruin it.

Here are 10 psychological biases to help you avoid a life of pain and suffering:

1. Doubt-avoidance:

Doubt and uncertainty make us feel uncomfortable.

And when we don't have clarity, we start rushing decisions to avoid that feeling of uncertainty.

When in doubt, take a deep breath and sleep on it before making a decision.

2. Overoptimism bias:

When we want something badly, we start overestimating our odds of success.

It's why so many people bet on their sports team to win.

It's also why millions buy lottery tickets.

Don't let what you want cloud your judgment of what you should do.

3. Reciprocation:

The tendency to treat others as they've treated us.

When treated well: "You scratch my back, I'll scratch yours."

When treated badly: "An eye for an eye."

Sometimes this tendency can lead to endless conflict.

Resist the urge to reciprocate bad behaviour.

4. Social Proof:

We copy other people's behaviour when making decisions.

Especially when we're feeling uncertain.

This is why so many ads have celebrity endorsements and user testimonials.

Next time you make a decision, be mindful of other people's influence.