Managing and accepting Eustress

Eustress is defined as an inevitable, and challenging form of stress that is good for the human body. Now I know what you thinking, how in the world can stress be positive? Well I don't know. I simply read it in my Personal Health book because I have a mid-tem to study for. However, I do understand what they mean by positive stress. Any sport (mental or physical) that presents a realistic and attainable challenge, that can be achieved is positive stress. Why is this relevant? Well, like I said I have to study. Plus blogging is way more fun than reading flash cards for hours at a time. Second, there is this writing website called "NanoWrimo" and they want me to write, and submit a short story. Normally I would jump at this chance, but I have a TWO research papers, a quiz, a test, and a reading guide due on Monday. So how in the (forgive my language) HELL can I write a 100 page short story, when I have to type a 1000 word, 3 page papers.