It's really quite simple -- all you need is fresh pumpkin seeds (rinsed of all the pumpkin goo), olive oil and salt.
After combing the ingredients, spread the seeds evenly on the pan, and put them in a 350 degree oven for 10 to "whenever-they-smell-done" minutes. Keep an eye on them, because they can burn quickly. I recommend popping them in your mouth every few minutes to taste.
I like my seeds roasted until their golden brown, and until they sound hollow on the tray. Store them in a tupperware-esque container, and keep them out on your coffee table. They'll be gone in no time.