I tape a conversion chart directly onto my flour and sugar containers...
I created an Excel spreadsheet, with the volumes in 1 column, and the weights in another.
1/4 cup = xxx oz
1/3 cup = xxx oz
1/2 cup = xxx oz
etc., all the way up to 5 cups.
So when I have a recipe that calls for 2 1/2 cups of sugar, I'll just check my sugar chart, which will tell me that I need 1 pound, 1 1/2 oz.
For most of my other ingredients, I use a permanent marker to write down the weight of 1 cup, like my cornmeal container, that says 1 cup = 5 oz. That way, I only have to weigh the 1 cup once.
Then I'll notate the weights on the recipes for the next time.
Makes it "weigh" easier to convert my volume recipes, and I love not having to get all the measuring cups!