Im sure you've thought of this already...
But take pictures.. alot of them.
You would be surprised how very easy it is to forget what bolts go where once you take the inside of your doors apart.
Take your time. Dont rush it.
I know our car are older.. And one would think that means simple technology, and to a point that's true.. but inside your door there are different moving pieces parts and several different things giving yourself alignment and adjustments and it's easy to forget what does what. So in that I would say take lots and lots of pictures.