This post may contain affiliate links. Please read my affiliate disclaimer here. Thinking negatively can stop you from reaching your goals. It can add more stress to your life. It can even cause you to live an unhealthy lifestyle. People who have a positive attitude live a fuller and happier life. Training yourself to stop the negative thoughts and instead have a positive attitude can take some time. It is the same as stopping a bad habit such as biting your nails, overspending, or procrastinating. If you can put some effort into changing this bad habit and instead see the glass half full it will help you out…