Differentiate between useful and useless thoughts.

Engaging only in useful thoughts will allow you to calm your anxious and worrisome mind, and give you a sense of peace and happiness.

1. Ask yourself, “Is this useful?”
   The next time you catch yourself worrying about something, ask yourself, “Is this useful?” If it is, then great. However, if it is not, drop that entire line of thinking.

2. Don’t allow your thoughts to turn into useless ones.
   Worrying, plotting, and planning are fine, as long as they are useful. Do not allow them to turn into useless, or even detrimental, thoughts.