Salad to take to work that doesn't get soggy

What works best is keeping the ingredients separate until you open it at work. I put the lettuce and veggies in one container, the dressing in another (preferably one of those small jars with a screw-top lid), and if you're gonna add protein or cheese you put it in a third compartment. The trick is not mixing anything until you're about to eat, because the salad gets all soggy right away if everything's been sitting together since the morning. If you use a container with compartments like a bento box, that's even better.