Not praising intelligence

There are many supporting studies on this, and I came another one which explicitly stated that

Praise for Intelligence Can Undermine Children's Motivation and Performance

The study suggests that parents should praise their children for the efforts they put in their tasks instead of praising the accomplishments or their intelligence for accomplishing the task.

Excerpt from the paper.

Praise for ability is commonly considered to have beneficial effects on motivation. Contrary to this popular belief, six studies demonstrated that praise for intelligence had more negative consequences for students' achievement motivation than praise for effort. Fifth graders praised for intelligence were found to care more about performance goals relative to learning goals than children praised for effort. After failure, they also displayed less task persistence, less task enjoyment, more lowability attributions, and worse task performance than children praised for effort. Finally, children praised for intelligence described it as a fixed trait more than children praised for hard work, who believed it to be subject to improvement. These findings have important implications for how achievement is best encouraged, as well as for more theoretical issues, such as the potential cost of performance goals and the socialization of contingent self-worth.