Every decision-maker needs to know the psychological forces that block intelligent decisions in order to guard against the pitfalls. This also leads to accepting the way things are. If certain outcomes scare us, we may not seriously consider these alternatives although they are good ones. Both can be disastrous. Chapter 14 has an extensive section about straight thinking which is clearly related to good decision-making.
Groups make good decisions if the majority of members are competent and work well together.
In some cases, where you know there are blind spots, the decision may need to be postponed until the barrier is reduced. If the decisions can't wait and if you are aware of serious psychological barriers interfering with the decisions, you should get professional help. There are always logical, rational arguments for and against each choice. It is important to write down all the pros and cons, putting together all the available factual information as well as your clear, predictable emotional reactions to each alternative. Let's discuss this a little more.