You can always rewrite your story's ending. Mindfulness assists with neuroplasticity so you can change course if you don't like the way your life story is going, you can erase the thought and start again. Journaling is a useful tool as it allows you to write stream of consciousness and get the 'keep you awake ~ midnight thoughts' out of your head and on to the page. Allowing you to get back to sleep and have access to the material at a more suitable time. Enjoy the process!