If you want to meet people at a fancy cocktail party, you don't come wearing a Hawaiian shirt, shorts and flip-flops. People will either ignore you or have you physically removed. Email marketing campaigns without best practices risk the same sorry result. You dress your email up in a Panama hat, send it to the crowd you thought might work, and realize too late that it crashed the wrong party. Now that's embarrassing. Here are the five best practices you should employ to make your email campaign turn heads—in a good way.