Simply changing a few words when you talk to children can drastically alter their, and your, attitude. The next time you find yourself saying, "Don't jump on the bed!", try instead to turn it into a positive phrase. "We sleep in the bed, we jump on the floor!"
Children often have a hard time interpreting what behaviors we'd like to see when we use the words don't, stop, or no. Stating what they can do instead gives them clear directions. Letting them know where it's appropriate to do the unwanted action will help them understand that their action itself isn't wrong, but there's a time and place for everything.