It's important to manage your time. A lot of time is spent on unnecessary things, especially in the information age where you have so many distractions. This can result in necessary tasks being left undone, which causes stress and the feeling of being overburdened with too much work, when the actual problem is poor time management.
The way to manage your time is simple. Prioritize your work. What are the two or three tasks you absolutely need to get done today? Make sure you do them. Writing those tasks in your diary will ensure you stay on target. However, limit writing down just a few tasks. Too many will render the process useless. And remember to check your diary throughout the day and put aside everything else to get your important work done. Once you're done with them, you can tend to other, less important tasks. In this way, you will be able to stay on target, get the necessary work done, and not overburden yourself.