Resuming from this article...
Relaxation - How relaxed are you? Were you feeling comfortable lying all day in bed? Well, studies have shown that relaxation level does not provide a good sleep. And this does not include yoga, since stretching your legs to a perfect 180 degree or curling it around your neck is actually a (painful at start?) form of exercise
Working out - Your body begs for attention, as does your brain. And I'm surely not recommending working out 10 consecutive hours. That is called exhaustion which further causes debilitation, not exercise! (double click for word definition) I personally have to say that my sleep is better after a 1km walk, 2x1=2km in total if you consider going back to your original starting point (For the American readers: 2 km is about a mile).
Computer gaze - As much as I hate to say it, hours you spend in front of your computer deteriorate your eyesight, make you fatigue (especially programmers gamers and article readers/researchers) and above all gazing at a computer all day can really worsen and aggrevate your sleep. Shut down your computer and take a look outside - there's a whole new world out there just waiting to be explored! You do not need Blizzard to make you a knight with +1 brain skill!
Well this article has come to an end. I hope you liked all the recommendations and suggestions pinpointing problems in sleep and sleepwalking (I might concentrate in insomnia next time). I also believe that after this article you will reconsider at least once before taking medicaments called sedatives :)