The best advantage that anyone gave me came from my Dad. He told me to never go to bed angry even if that meant staying up for a week. And when a fight does happen, walk away. Don't leave that location, but walk away for a minute, calm down and them calmly talk things out together.
It's helped me a lot. Especially with this marriage. My first one was doomed from the beginning because of another piece of advice someone gave us. It was a great piece of advice, but just not specific enough. The advice:
Never stop dating. You have to keep the romance alive.
The guy just wasn't specific enough apparently because he didn't specify to my ex that we were supposed to keep dating EACH OTHER.