4.
You are shot with an arrow!
You were shot down like a dog. Maybe you were too dangerous to get close to, but I suspect it was more a convenience thing (come on. You, dangerous?). Someone wanted to get the job done effectively with the least amount of effort, and you never had a chance. You probably didn’t even see who shot you. You are most likely to be shot at The Twins or Castle Black, though King’s Landing has its share of arrow-related deaths.
Death by shooting is a fairly common, undistinguished way to go. You are probably a foot soldier, fairly unprotected and caught unaware, though it is possible you are of noble birth. Your death says more about your killer than about you: he or she is probably not a strong hand-to-hand fighter, and would rather not get close enough to find out. Or maybe they are just lazy. Heck, maybe a stray arrow fell out of the clear blue sky and took you out. Bonus points if you are shot while on the toilet.