Your usual way of thinking about the world is your mind-set. If you're dreading taking the SAT, remember that a positive mind-set will not only make you feel less stressed and more confident, but might even improve your test score.
Your feelings, attitudes, and opinions about things make up your mind-set. You might have a pessimistic mind-set, always seeing the glass as half-empty and generally expecting the worst, or a hard-working mind-set, with a habitual focus on being a conscientious, dedicated worker. In the 1920s, the term was considered to be "educators' jargon," and defined as "habits of mind formed by previous experience."