This month's Fix-It Friday book mending topic is short and sweet: some quick ways to get straight, square measurements without taking down a lot of numbers.
First of all, it's useful to know how wide your regular metal ruler is, and to use a cutting mat that has grid lines printed on it. You can use the width of the ruler as well as its length as a measuring tool, and the paper or stock you are cutting can be placed square on the grid on the cutting mat to ensure a straight cut.
A trick I learned recently was to install a jig onto the cutting mat that can be used to jog up paper and hold it true and straight while cutting or folding. Such a jig can be made easily with a piece of thick, stiff board (here, a strip of Davey book cover board), attached with strips of double-backed tape.