“the strategies correlated with success were: thinking about the positive consequences of getting to the end (this was also the most popular strategy); monitoring one’s goal progress; thinking that the end is near (the second most popular strategy); and emotion regulation (e.g. trying to stay in a good mood)”

Study Identifies The Most Effective Mental Strategies That People Use To Get Through Aversive Challenges

By Christian Jarrett. Trait self-control and effective strategy use may represent two separate routes to greater persistence.