There are two types of stress for me: the one where you are totally blocked and you barely make it through just before falling into the deadly tentacles of death, and the one where I feel it extremely easy to finish a task thanks to the motivation of stress.
Now. How do I transform the first type of stress (let's call it the Tentacles of Death), to the second type (the Anchor To Happiness)? For me it's simple, maybe for you it's different but we may have some similarities. What I do is visualize myself finishing everything I have to do, and when I finish visualizing it I realize it's really simple. And that whatever is stopping me from getting there is pure bullshit.
So whenever I'm blocked I just visualize, for example: today I have to study five chapters of Biology for the day after tomorrow. Gosh that sounds like a lot doesn't it? Well maybe if I just spend an hour on each chapter without any distractions, I might finish and still have time to catch up on my reading this week (It's Kind of a Funny Story by Ned Vizzini, that's where I got the tentacles and anchor stuff).
The only obstacle in between you and your Anchor of Happiness is yourself (actually just your mind), and how can you counter the Tentacle of Death? With mind itself. Mind vs. mind. You are your own enemy.
Recommended book: It's Kind of a Funny Story by Ned Vizzini, what I learn from this book (and I haven't finish it yet) is that school might seem like a huge problem, like getting a job and having a place to live are all you need. But really, that's not the meaning of life. It's not up to me to describe what's its meaning, but I think you get the idea.