Nezlek, J. B. (2001). Psychological well-being and the planfulness of day-to-day behavior. Journal of Social and Clinical Psychology, 20, 452-475.
For 21 days, participants provided measures of how carefully they had planned their social and achievement related activities for each day and how well these plans had been realized, and they provided measures of their psychological adjustment. Compared to participants who were not at-risk for depression, participants who were at-risk planned activities less carefully and their plans were realized less fully. The daily psychological adjustment of all participants was higher on days when their plans were realized more fully than on days when their plans were realized less fully, and the size of this relationship did not differ as a function of participants' risk for depression.