Evaluation of an online action planning program on fruit, breakfast and snack consumption for students of prevocational schools to turn behavioral change intentions into actual behavioral change, an online action plan program about fruit, snacks and breakfast intake was developed for the krachtvoer program for prevocational school students. This paper describes the content of the action planning program and the results of an evaluation study among 539 students concerning the usage of the program and implementation of action plans in practice. Further, program appreciation by teachers and students was assessed. More than 64% of the students completed at least two program modules and 61% made an action plan. About 34% of the student who had prepared an online plan, reported to have implemented the plan successfully in practice, while 65% was partly successful. Program appreciation among students was satisfactory, appreciation among teachers was good. Using pre-structured online action plans seems to work well. The implementation of this postmotivational program element should always be part of a larger program in which elements aimed at changing the premotivational phase of behavior change are included as well.