There are surely those assignments in your task list which you find a little fidgety going about; let them be your first tasks to get sorted by tackling them first in your list of priorities. The secret of this is that with these seemingly hateful tasks sorted and crossed of your list, you will feel a degree of relief for the facing of the other items in your schedule of tasks. These tasks when postponed in the task list will ever remain a source for wastage of the priced time when you will ever find yourself ever wallowing in the valley of indecision over what to do with these dreaded assignments.
The second tip is to condense your tasks in a precise short-list of priority items in order of significance. Size them in bits and as you get the first ones done and struck off your list of assignments, you get the bravery and morale for facing the others as you will have a feel of more time to tackle the remaining items. Precisely put, let your list be one that encourages your resolve to get the assignments done and not the one that seems a mountain which basically takes away your resolve.
The fact of the matter is that your spending of time on social media is actually taking much of your valuable time. Get some additional time to your life by taking off some of the time you spend on social media and allocate them to the other aspects of your life.