1. Watch your initial assumptions 

We tend to look for data that supports our current view (think of initial impressions in interviews and the questions we can ask to re-enforce them). Look for information that contradicts your point of view, as well as facts that support it.

2. Source

People tend to put more weight on the views of friends than they do on research from a reliable source. Place value on the source of the information that will affect your decisions, as well as the information itself.

3. Group decision

If a group of you can’t agree on a decision, decide on the criteria for assessing the options and assess each alternative against them. Alternatively, make sure you all agree on the question that you are trying to answer.

4. Make your decision based on your best assessment of the future implications

It's easy to be persuaded towards a particular course of action because of the effort that has already gone into making it happen, but this is shaky logic.

5. If you are stuck between several options allocate each alternative to a different number on a dice

If you aren’t happy with the number that comes up then dismiss this option and roll again. Odd though this sounds, it may force your real preferences to the surface.

6. When taking in information to make our decisions, we pay more attention to what we discover first and last

Make a conscious effort to give fair weight to what you learnt in between your initial and most recent discoveries.

7. Imagine that the decision has been made and think about what is likely to happen as a result

By immersing ourselves in the future, we can discover implications that weren’t previously obvious.

8. Before you make a significant decision, talk it through with someone who is unlikely to agree

Their challenge will help you make sure that your thinking is rigorous.

9. It can help to leave time before making a decision to allow your unconscious mind to ‘mull’ on it

But set yourself a deadline or procrastination may set in.