Here are three personalities that should be in your circle:
The Optimist. We all need a cheerleader, the person that will tell us we can do anything and will point out the positive in any situation. The Optimist is perfect when you’re feeling down and need a pep talk.
The Analyst. This person knows a little about a lot of things and enjoys sharing the knowledge. (S)He has a practical way of reviewing facts and presents a solution based on numbers, not emotions. You may not get an instant response, because this process may take some time.
The Naysayer. You need someone that can see pitfalls and is open enough to tell you. When choosing a naysayer make sure (s)he has your best intentions at heart. If you feel their intentions are not good then by all means find another naysayer.