Time Management Exercises

I found this article on The Digital Photography Courses website.  It has some helpful tips on getting started with good time management habits.  As a student and beginning photography business person, I get overwhelmed with things to do.  Sometimes the list is so long, I just feel like tossing it and not doing any of it.  I think I do a pretty good job with managing my time but I would love to know how I can do a better job.  Some of the most helpful tips were to estimate the time it will take to complete a task and minimize and organize the items on your desktop.