I used to like to use Au-Ve-Co offset clips # 10780, but I now use Au-Ve-Co clips # 12134. Both of these clips require a 7/16" or 1/2" hole in the panel 5/8" in towards the center of the car door from where the holes in the car door are. I like this style of clip because the clips are attached to the panel after it has been upholstered so they're not in the way when I'm working on the front of the panel. Remember, if you have to drill new holes in the door, to avoid places that do not let the clip fully seat itself. Also, remember that the door has glass in it so don't impede the window glass with a clip in the wrong place.
No one lives forever, the trick is creating something that will.