I came across this today :http://www.kingarthurflour.com/recipe/master-weight-chart.html How close are your own measurements to it? My AP Flour comes to 125g for a cup, while theirs is 120g. One thing I did notice, that I have a question about is Sugar vs Brown sugar. Do your weights between the two differ? Mine came out the same, 175g for both white sugar and packed brown sugar.
I use that chart all the time, and as far as the flour weights are concerned, they're specifically for KAF flours. So any other brand is going to be off. I only use KAF flour in my baking, so I pretty much have those weights memorized!
My white and brown sugar weights are close enough to the KAF measurements that I just automatically measure 7 or 7.5 ounces of sugar per cup. I will say that the first time I try a recipe that doesn't list volume measurements, I will measure out using cups, etc., weigh each of those amounts and write it down. If the measurements come out close to KAF measurements, I go with that, and I really haven't had anything explode on me.
(OK, there was that one time, but it wasn't because of the KAF chart. It was because I got distracted while mise-ing out my dry ingredients, and I added the baking powder twice. And I now let the telephone ring if I'm weighing out anything! Oh, the mess in the oven...)