Not many people work well under pressure. Still fewer can whip together a decent assigment without taking the steps necessary to ensure success.
By having an assignment plan in place, you will have enough time to comfortably complete the required tasks to produce quality work AND take away the skills and knowledge that will serve you in your post-graduate work, whatever path you take. You'll also find that each step in the process makes the next step easier and less daunting.
An assignment plan lets you approach your academic work in bite-sized chunks. Panic and procrastination fade away when you see the assignment as a series of smaller tasks that can be tackled individually.
Before you know it, you'll be ready to hand in a top-notch piece of academic work!