Needing to pinch the laterals off your tomato plants? This only applies to indeterminate tomato plants. "Determinate" tomatoes are bush types of tomatoes that grow to a compact height. "Indeterminate" tomatoes tend to have longer stems and fruit along the stem, not just mostly at the end like determinate varities do. On a shorter variety of tomato it's best to leave the laterals and they should fruit all laterals