I just noticed that the're a nail in my tire. I can see the head, and it's about in the middle of my tire, on the tread portion. I've got one of those plug patch kits, but have never used it. Is fixing this problem as easy as pulling the nail and putting a plug in there, or is there more to it? If I went to a tire shop would they use a more permanent / better fix, or would they do the same thing that I'd do at home?