Reading emails, texts or tweets during the time you have set aside for writing.
You may be underestimating the amount of time to complete assignment tasks. When you underestimate the amount of time a task will take you may end up feeling frustrated, anxious, or down on yourself for not meeting your own deadlines. And these feelings may lead to putting off the next task.
Know Yourself
Set realistic goals and appropriate time frames in which to complete tasks. Learn from past experience how much time you usually need to accomplish a particular task. Be clear with yourself as to what you want to accomplish, think about how much time you will need based on past experience and then plan at least that much time in your schedule. If you finish early you can always use the remaining time for other work or emails.
Review Procrastination Solutions located under Resources.