When dealing with failure many emotions can come into play. You may feel frustrated, agitated, aggravated, sad, angry, depressed, lost, and it's not unheard of for certain people to even feel suicidal. These are all reactionary emotions. Remember, your plan isn't based on one single outcome so never allow yourself to be too high when in the midst of victories or too low in defeat. Managing your emotions, however, doesn't mean ignoring them. These emotions will come regardless, just recognize why you feel them and use them for your own benefit.