For me, it's bad dreams.
To date, I've had three different dreams on the topic of AS results. In each dream, I fail all my exams - getting Cs, Ds and Us (sometimes in subjects I don't even take, proving that my ability to worry really has surpassed itself). Thinking I was the only one having paranoid dreams about results day, I mentioned it to my friends, only to find out that several of them are going through the same thing!
Of course, I should be less surprised. Student stress is universal, after all. There's nothing I can do, except try and distract myself with other things.
Which is why this summer, I'm going to have fun.
The second those school gates are flung open for the summer holidays, I plan on seeing friends, going to the cinema, getting cheap theatre tickets for shows in town, going to parties, and just having a bloody good time.
Anything to avoid the thought of exam results.