[_AzMoo]

When I was faced with this issue I found that spending about 30 minutes at the start of the day planning, and then another 15 minutes or so at the end of the day conducting a retrospective, really helped. Start by creating a list of tasks to be completed, and then prioritise them. It helps to be very specific with your tasks. Don't have a task be "work on assignment 3", have the task be, "Find 6 articles to support section 1 of assignment 3". Once you've got your prioritised list, work on them starting from the top and mark them off when you're complete. Sometimes you will have emergency tasks come in that take priority, and that's ok. Log them in your task list and work on them like any other task. It's ok to not complete the tasks you planned for the day. In your retrospective, critically examine the tasks you completed, and determine (and log) why you either did or did not complete everything you'd planned. Next morning in your planning session, take yesterday's list, re-prioritise with any new tasks that have come up, and work through the process. If your tasklist keeps growing and growing forever, then it's just fundamentally clear that you have too much work to do in the time allocated and you need to either bring somebody else in to help or start making sacrifices, either with the tasks you take on or the quality/effort of your work.