Do you find i hard to have enough time? Is keeping appointments and your own plans a problem? And don't you know what's wrong? Try registering how you use your time for a short period of time.
In order to find out where the problems are, you need to know what you want to spend your time on. Decide on a periode of time (for instance a week or some representative days) where you'll register how you plan to spend your time, and how you actually spend it.
Jot down things such as: Effective work, phone calls, interruptions, preparations, urgent assignments, etc.
With this registration you are able to find out:
Whether you get the things done, you planned.
How big the agreement or disagreement is between what you have planned and what you are actually doing.
How much time you actually spend on non-planned assignments.
How much time you could advantageously reserve for non-planned assignments and thereby make a time-realistic plan that includes time for the non-planned.