It is very important to block your gauge swatch before beginning your garment. Make your swatch, place it on a padded surface, sprinkle with water and stretch and pin in place. Measure when dry. When measuring your work, be sure to stretch out, as you did for the blocked piece, for a more accurate measurement. Starting each Front with a separate ball of yarn makes for a more even color striping. Be a row counter. Make sure you have the same number of rows to armhole on Back and Fronts. This makes for easier assembly and matching patterns.