When one meditates, regardless of the meditation practice undertaken, it is common for uncomfortable thoughts and feelings to surface into one's awareness. The emotional energy in these can be released using AER once one has reached the end of the meditation session, or at some later time. Releasing these uncomfortable thoughts and feelings will enhance your meditative experience.
Having a better life is not about just having positive thoughts, saying affirmations, or visualizing something better. It is about being that change, and that means that one has released all the old beliefs and feelings that hold one back.
True release is not a simplistic mental process - it is an integral experience which involves your head, your heart and your physical body.
If you want to stop fighting with yourself and have a better life, then start letting go of all the emotional glue that holds you back - AER is designed to make that a lot easier and quicker.