You may notice that many of my recipe measurements are given in weight. Measuring by weight, especially in baking where precision can be crucial, is the most accurate. However, I try whenever possible to include volume equivalents as well for ease and convenience.
If you do a lot of baking, my tip is to do as the pros do and get yourself a digital scale. It need not set you back too much (about $20 and up) and will go a long way in helping you achieve more consistent and yummy results in the kitchen. Give it a try!