Fostering certain attitudes of reflection increases the likelihood of being effective in reflective thinking. Dewey (1933/1989) stated there are three important attitudes to cultivate, which include open-mindedness, whole-heartedness, and responsbility. Open-mindedness refers to freedom from embracing preconceived notions in light of new ideas or evidence. It can also mean a receptivity to new ideas. Whole-heartedness refers to focusing attention on the topic of interest, not dividing attention amongst other activities. Responsibility refers to being aware of the consequences of ideas, and being open to adopting these conclusions when they reasonably follow from known facts.

Reference
Dewey, J. (1989). How we think. In Jo Ann Boydston (Ed.), The later Works of John Dewey, 1825-1953, Volume 8: 1933, Essays and How we think, Revised edition. Carbondale and Edwardsville, IL: Southern Illinois University Press.