Doubt

A little critical, analytical thinking is a good thing. Without doubting ourselves sometimes we'd find it difficult to make good decisions.

Too much doubt, though, can stop us living our lives to the full. Some people can never make up their minds about their careers, family, their love lives or much else.

Unfortunately that sense that you're not quite sure can leave you living in permanent limbo, never taking that final decisive step.

The problem is that we can we never really know what the outcome of our decisions will be, that's the nature of life. But the person who never takes a risk, however small, never gets anywhere. At some point, after a little looking, you've got to leap.

Psychologists have found that people who doubt themselves too much end up engaging in excessive information processing which leads to procrastination and self-handicapping.

Self-doubters are also more likely to suffer from depression and social anxiety. Some soul-searching and self-analysis can be useful, but too much is a recipe for stagnation.