"Stop it," right there! That instant!
Yes, halt your unproductive thoughts as soon as you feel you're having them.
You can always choose your thoughts. As soon as you realize you are being approached by unwanted unhappy thoughts like; anger, frustration, jealousy, fear, worry, blame, selfishness, and comparison- please interrupt them, then and there. Immediately choose an activity that can engage your mind and heart 100 percent- something that can bring you joy and smile instantly! Completely shut down your "thinking process" at least for that moment of time, and move on to the good feeling activities; that's happening around you.
Replace those errrrr feelings of frustration, that's stemming from you for your failing efforts, or from other sources! But stop them right there.
There may be many defined rules and or tips to stop feeling negative; but everything will work only when we take the charge of our thoughts; and filter only the productive ones to have access to our heart and mind- may be with some mindful practices!
I have had been trying hard to find those reasons with which I can win over my negative thoughts. And finally, I got hold of them- nowhere else, but inside me. I was excited to learn about the "powers" we have inside us. If we want, we can for sure!
I would like to share those three simple ways here