Change the time of day or the location when having a disagreement or fight. If you usually fight at night, get your partner to agree to only disagree during the daytime … and actually schedule a time for the conflict. If you generally fight in the bedroom (one of the worst places to fight) then agree to move all of your fights to the kitchen … or out to the back deck. If you have fought in every room in the house, then agree that all disagreements must be taken outside.
Changing the location and time can change the flavor and feel of the disagreement and help keep partners from falling into the bad patterns that caused problems in the past.