I could give you a trick I use which is not really a trick per say but it can save you from unecesarry arguments :)

When you notice someone (in this case, your wife) starts the argument just let her say what she has to say and when it's your turn to say something just tell her "I love you more than this argument" <-- which is true, right? Maybe give her an unexpected hug :) Usually, the other person calms down

Much love

E