Secondly, if it is a strapless or spaghetti strapped dress, you need to find something to cover your shoulders with. This is where dresses can be ruined…You have to have a cute jacket, or it can totally throw your whole dress off. I think the girls at our school did a GREAT job with their cute little boleros. Most of them all accented their dresses.
Thirdly, you want to make sure it is high enough in the front. If it isn't, you can add a piece of material pinned inside the top of your dress to give it a couple of extra inches to hide any cleavage. You can also wear a lace camisole, you just have to make sure it's not too "casual" looking.