How can I stop thinking about something?

 1. “Less said, more time.”  This is my own personal motto. Saying less and letting more time pass  when we’re dealing with a difficult, reactive person is almost always a  smart move. It allows us to simmer down, let things go, and take the  high road. With time, the thing we’re annoyed about often just falls  away.

2. “Let’s just wait and see what happens next.” We  sometimes feel the need to respond and react to difficult people or  situations right away, which is why we stew over what to say or do next.

3. Move away from the blame game. Picking apart past events and trying to assign blame (including blaming yourself)  is rarely productive. Bad things and misunderstandings most often  “happen” through a series of events, like a domino effect. No one person  is entirely to blame for the end result.

4. “Try not to fall into other people’s states of minds.”

5. “Deal with your biggest problem first.”  . Our anger creates a cloud of emotion that keeps us from responding in  a cogent, productive way. In that sense, our anger really is our  biggest problem. Deal with yourself—meditate, exercise, take a long  walk, say less and give it more time, or whatever it takes—before you  deal with anyone else.

6. “When you're angry it wrinkles the mind.”  You can’t think clearly or be creative or thoughtful about how best to  handle any situation when you’re mad. "Anger wrinkles the mind," she  says. If you want to think clearly, "you can’t be mad at anything.”

7. “Don’t try to figure others out.”  If others tried to figure out what you’re thinking, or what your  motivations are, how right do you think they’d be? They probably  wouldn’t have a clue as to what’s really going through your mind. So why  try to figure out what others are thinking? Chances are extremely good  that you would be wrong, which means all that ruminating was a colossal  waste of time.

8. Your thoughts are not facts. Don’t treat  them as if they are. In other words, don’t believe everything you think.  We experience our emotions—anxiety, tension, fear, and stress—keenly in  our bodies. Our emotions are physical. We often take this as a sign  that our thoughts must be facts.