Cognitive Distancing
Our mind can worry about things it is convinced are true but, most of the time, are actually not true. You can balance your mind's tendency to predict the worst outcome by coming up with positive alternative scenarios. For instance, your spouse seems distant and is sending out a lot of emails. You decide he must be having an affair. An alternative scenario: He is working extra hard on a project. Analyze what's most likely to happen. Most of the time, the worst-case scenario your brain comes up with is not the most likely one.
Use a mantra
Mantra’s can be incredibly powerful tools when used correctly. A mantra is just a simple phrase or word that you repeat to calm your mind. Research has shown that repeating a mantra reduces activity in the part of your brain that is responsible for self-judgment and reflection. This is the part of the brain that spends so much time rehashing the past and worrying about the future. You can use any word, sound, or saying you want. You could try something like, "Om," "Life is good," or "Everything is OK." Repeat your phrase over and over, focusing your thoughts only on your mantra. If your mind wanders, return to your mantra. You can practice this almost anytime, even when out shopping or on your commute home from work.