There are two main benefits of using this method:
Identify the few critical tasks that contribute the most income, and schedule them with very short and clear deadlines.
Otherwise, the unimportant things will become important. Deadlines and clear focus are very important.
Put a Post-it on your screen with this question:
Are you inventing things to do to avoid the important?
Try to use software that will reduce the distractions.
A recommended one is www.rescuetime.com.