Looks can be deceiving. Your double serving of pasta might look like it's a normal size when served on a big plate, but you're probably eating more calories than you intended. When you're dishing out dinner at home, reach for the smaller plates rather than your big entree plates for food that gives you portion control trouble. Less food in front of you means there's less of a chance you'll overeat.
In the same light, think about switching out your big fork for one that's smaller. Taking tinier bites will slow down the whole eating process and increase your satisfaction. So even though you're eating less than your dining partners, you won't be finished before everyone else and tempted to head back for another helping.