Who Needs Travel Insurance?

I am planning a short trip, and I am wondering whether or not I should get travel insurance. I have never gotten it before, but now I am going overseas so I am thinking it might be more useful. Can anyone tell me when it is worth it to get a Cheap Travel Insurance policy for a trip, and when it might not be so necessary? I really don’t want to spend money unnecessarily, but then I don’t want to have any problems and not have insurance to cover it if it can be easily avoided. I think I am going to check and see how much the cover would cost.