Planning is only good if it works. Semester planners, timetables and diaries are not useful if you do not follow them. Sometimes it takes a while to work out which planning strategy best suits you. For this reason, it is useful to monitor your progress.
The first thing to do is to check your planning.
If not, you may need to make some changes.
You may also need to reassess your goals. Finally, after all of your plans, what if something goes wrong?
See also Informaizer states for more details.