I'm rather primitive about In/Out. I have a running list of + and -. Occasionally I add it up.
For number of yards, I measure the quilt in square inches for front and back and binding. Divide that by 36 x 40 for yards. Because they're pieced I up the amount to the nearest 1/2 yard. When stash is less than 1 bookshelf, I might get more precise....might.
Another practice that has helped emensly is always pay cash. I get real tight when I count how many $20's it takes to pay for it. The dwindling supply of $20's in my purse makes me think more about what I need and want to spend it on.