1. Don't name callWhat you do: In the heat of the moment, it's very common for people to start insulting each other and say things that, let's face it, we don't really mean or want to say.
What to do instead: Focus on the issue that you're actually trying to solve and don't attack your partner personally. Make sure your fights don't end up in insults that could actually leave long-term emotional scars.
Telling your partner he's a 'useless lazy lump' will stay with him longer than his inability to empty the dishwasher. In fact, he's likely to forget the point of the argument totally if you insult him.
2. Keep to the pointWhat you do: Allow the argument to move onto all sorts of little niggles and whinges you have about other things that your partner does or doesn't do.
What to do instead: When you're arguing about something specific, make sure you do just that. Be honest about what it is that bothers you and stick to it.
By only fighting about one particular issue at a time, you're more likely to come to an agreement than if you branch off into lots of other things.