clipped from: www.lifehack.org   
The brain isn’t a flawless piece of machinery. Although it is powerful and comes in an easy to carry container, it has it’s weaknesses. A field in psychology which studies these errors, known as biases. Although you can’t upgrade your mental hardware, noticing these biases can clue you into possible mistakes

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The entire domain of the scientific method has largely been an effort to overcome the natural inclination towards bias in reasoning

common thinking errors:

1) Confirmation Bias

tendency to seek information to prove, rather than disprove our theories

2) Hindsight Bias

see past results as appearing more probable than they did initially

3) Clustering Illusion

see patterns where none actually exist

4) Recency Effect

give more weight to recent data

5) Anchoring Bias

a well-known problem with negotiations

6) Overconfidence Effect

people tend to grossly overestimate their abilities

7) Fundamental Attribution Error

Mistaking personality and character traits for differences caused by situations