How do I stop myself from having irrational thoughts about situations?

Yoga, meditation can take your mind of many things and can reduce stressful thoughts.Also listening to music can help dramatically

Keep yourself busy. Stay out. Read books. Hang out with friends. Stay away from being idle. Spend more time with loved ones.

You can stop yourself from having irrational thoughts by taking a breather and taking time to review the situation, how you feel, what you can do, what you can tell others or what the best solution is before doing the action you want to do first. Doing this can help remove any negative possibilites and promote better outcomes.

I can ask myself, "Is this true?" and journal about this question. I can also run this question by a friend or a family member and see what they say about the irrational thought I'm having to get some feedback.

You are not alone. Do not be embarrassed to ask for advice. You may also compare your version of reality with that of other people, particularly those people close to you whom you can count on to tell you the truth. This is not about letting other people think for you – it’s about looking at all sides of the equation. So you have a theory. Test your theory. Gather more data. Compare or contrast. Alter your version so that it encompasses more than just your narrow viewpoint. This is also a way of gaining perspective. Be kind to yourself. You are not the first person to think or behave irrationally. You will not be the last. People do it all the time. The point is not that you have irrational thoughts but what you do to minimize their impact on you.